libcoap: Upgrade 4.3.0 -> 4.3.1

Drop merged backport of 7e20aa9ef172 ("coap_session.c: Balance
SESSIONS_ADD and SESSIONS_DELETE usage").

  c694baead2f9 Update version to release 4.3.1
  ab9488559f5e Doxygen: Fix missing links for later versions of asciidoc
  144f9c4381c1 Manual pages: Update NAME section to contain all of the alternative names
  707aed35d39b Doxygen: Hyperlink man page functions
  46feac2455ab Misc: Tidy up documentation and space usage
  d09204e24aba Doxygen: Add in individual man pages for the ease of finding the functions
  09aab40d14f9 Tag release candidate 2 for version 4.3.1
  2755af4d1a16 block.c: Clarify ignored result from coap_get_data()
  5f0eea8dbbc4 coap_session.c: Fix adding NULL pointer on error in coap_new_server_session()
  ea89cb842cf6 coap_cache.txt.in: Fix typo in function name
  922e81a0d21f Doc: Include statement about upgrading to 4.3.1
  5c498249e7e7 ChangeLog: Add summary for version update to 4.3.1
  4f12b9be1b7b coap_event.h: Clean up Doxygen documentation for coap_event_t
  43bfbea924e0 Copyright: Update dates to 2022 where appropriate
  37731524a0ad RFC8516: Document support
  a7b2f2b4901b block.c: Timeout coap_lg_crcv_t structures correctly
  f4507e6e9adb Block: Report event on large xmit failures
  3d387a5be485 block.c: Correct size of allocated PDU buffer
  6a9a787503ec Observe: Clean up server timing out after observe failures
  725e464421e0 mcast: Tidy up logging
  381ff3d94da2 PDU Data: Clean up internal usage of PDU data
  0f0cac71f5e5 Observe: Support disabling observe cancellation on session close
  bc4c75060b86 coap_mbedtls.c: Fix output type of a log message
  b8f01cef06f0 net.c: Move variable into correct block
  58a8b338045b net.c: Send appropriate delayqueue entries in coap_cancel_all_messages()
  b4306bb79162 observe: Make sure the correct token in used for cancellation
  c68d1e9fe785 mutex: Do not output mutex warnings for LwIP and Contiki
  7f551fcea56b coap_mbedtls.c: Upgrade to mbedTLS v3.2.1 - Updated the deprecated APIs with the respective alternatives   - `mbedtls_ssl_conf_min_version` => `mbedtls_ssl_conf_min_tls_version` - Updated fields for `mbedtls_ssl_ciphersuite_t`   - `max_major_version`/`max_minor_version` => `max_tls_version` - Added macros for backward compatibility
  8c15b896ef30 esp-idf: Stop -Wformat errors for uint32_t variables
  0ca2fd4a90b5 Tag release candidate 1 for version 4.3.1
  9962bab56f6b Updated tinydtls to current develop HEAD
  8fbe440f8aaa coap_io.c: Updates for esp-idf port
  d2306569d16a proxy: Make proxy requests separate responses
  98ecf5a2a166 tinydtls: Update submodule to latest version
  8c973a454e73 mid_duplicates: Drop general responses duplicates
  dc92fe5e1ea6 coap.h.windows.in: Fix missing file renames
  347270b9abc4 file naming: Rename files to have coap_ prefix
  8b9377ef2ad4 coap_mbedtls.c: Fix memory leak
  e8052b3988ec resource.c: Further fix making subscribers iteration safe
  f93b9a3e37cf coap_mbedtls.c: Catch connection reset in coap_tls_write
  d5bcb8159b73 resource.c: Make subscribers iteration safe in coap_notify_observers
  0d9f2531e5dd coap_session.c: Free off session's last_token on session deletion
  415fbdb7cddf RFC9175: Add in support for the Echo and Request-Tag options
  88ae9563e665 mcast support: Support multicast granular to the resource level
  73565196a8f3 block.c: Fix error handling with Block transfers
  132c72619032 net.c: Handle multiple same token request/responses
  d68f5d6f5713 net.c: Handle well_known requests when there is no libcoap block support
  fe51d3335e81 lwip: Fix minor issues
  6046dcbd5589 net.c: Fix broken client only build
  20f15a17d698 Large Observes: Prevent server sending new response if active response
  5a10ce4890ff Congestion Control: add in RFC7252 configuration flexibility
  41afb92141c5 net.c: Update .well-known/core handling to use common logic
  6b32ed3de2fb coap_io.c: Track ICMP Host Administravely Prohibited error
  279755b1df9e coap_send: Make error checks for coap_send() more rigorous
  925d39fd8cfb coap-server.c: Cleanup misplaced comment
  c77176714770 coap_gnutls.c: Handle another error in do_gnutls_handshake()
  801e5492f2e6 CSM: Move coap_client_delay_first() to later in code processing
  346a831cd604 block.c: Correctly preset updated_block variable
  56db248daba6 async.c: Remove white space
  256a758e0273 TLS SIGPIPE: Stop programs exiting with code 141 (128 + 13:SIGPIPE)
  6649bdef39db net.c: fix null pointer exception
  03a9059439d0 BERT: Support block BERT szx of 7 for reliable protocols
  445a9481deca RFC7390: Update support for RFC7390
  428f759659a4 coap_mbedtls.c: Fix coap_rng() return for 3.x code
  1b2668f562e9 CMakeLists.txt: Correctly determine cmsghdr support for determining addresses
  21fd838dc781 coap_io_prepare_io: Re-order function code for correctly updating sockets[]
  cfbf3ab617f8 doc/main.md: Update copyright year
  f28044303abe net.c: Make sure separate response is CON for CON requests
  069a0786ce85 CSM: Support different XMT and RCV Max-Message-Size
  9cbe5757cb69 recursive mutex: Stop recursive Mutex when doing handler callbacks
  d9c19c378f3f event.h: Add events for server session state management
  7e20aa9ef172 coap_session.c: Balance SESSIONS_ADD and SESSIONS_DELETE usage
  806861359b81 configure.ac: Allow using non-vendored TinyDTLS with autotools build
  6c8b76d534a0 tinydtls: Update to latest version
  aa391b5b7601 async: Handle changes to delay when using epoll
  65cba25cc7e5 coap-client.c: Delay sending each request using -G by 1 second
  d57d44aa142a block.c: Fix data leak in coap_add_data_large_internal
  eb7656850f1c pdu.h: Add Content-Format for application/ace+cbor
  c8458f262ab8 coap_mbedtls.c: Fix return brace location
  583c29fd47d9 coap_mbedtls.c: Make TLS error recovery more rigorous
  02deef8da6ac coap_prng.c: Added alternate RNG implementation - For targets having their own hardware entropy/RNG implementation   using mbedtls_hardware_poll() - This change was made as since mbedtls-3.x, passing a RNG function   to all functions that accept a f_rng parameter is mandatory
  916a534e170b coap_mbedtls.c: Upgrade to mbedTLS v3.x - Added MBEDTLS_ALLOW_PRIVATE_ACCESS to access private struct   members wherever required - Updated deprecated functions from hashing module   (E.g. mbedtls_sha256_starts_ret() -> mbedtls_sha256_starts()) - Added mandatory RNG parameter for some functions   (mbedtls_pk_parse_keyfile(), mbedtls_pk_parse_key()) - Remove support for parsing SSLv2 ClientHello
  b42c184f74a6 block.c: Fix possible null-pointer dereference
  df72a53f2d66 coap_openssl.c: Support Microsoft VS builds
  0f76881802af autogen.sh: Fix missing file ar-lib
  19928e81bd42 builds: Set CFLAGS += -Werror in all linux subdirectory compilations
  b2ad43319a0f doc/Makefile.am: Include module_api_wrap.h in a distribution
  dfc678c33bd1 Proxy: Support unknown Critical but Safe-To-Forward options
  93f2738c451d coap_pdu_setup.txt.in: Clarify / more make readable the pdu setup information
  5b32d716fa03 github workflow: Support windows-2022
  bd9ced550e07 pdu.c: Fix coap_insert_option with delta = 269
  ba585f848ff5 [OSS-Fuzz] pdu_parse_target.c: Check result of coap_pdu_parse()
  a2e0046c802f [OSS-Fuzz] pdu_parse_target.c: Fix compiler warning
  b3d503cbff07 sessions: Prevent multiple client session confusion
  726b9630e51f coap_block.txt.in: Clarify / more make readable the block handling information
  756bb042395d pdu building: Enforce the application order of building a PDU
  c02ca5f097d6 coap_pdu_access.txt.in: Add in documentation for coap_get_uri_path()
  aaf611559482 proxy_uri: Fix handling the resource for uri path in Proxy-Uri
  a8c00f2af9c6 coap_pdu_setup.txt.in: Better document coap_encode_var_safe8()
  64e56410177b versioning: Make current git describe available
  0a16d790ce53 cmake_coap_config.h.in: Fix definitions for when building with tinydtls
  17aaa81b5ad3 Caching: Highlight requirements ignoring certain CoAP Options
  74582eddde28 resource.c: Support deleting resources that have not yet been added
  32d2d0e1c62b request_handler: Report only when app's request handler is actually called
  5dc2dfca86ec block.c: Do not match large response if no Block2 option in request
  18888cd0dde3 cmake: Install example programs if examples enabled
  c0e032ffad0b block: Check block size space correctly
  693a4e231386 net.c: correct return value in coap_send_internal()
  38bffb7f99d9 configure.ac: Fix have mbedtls lib, but no mbedtls-dev issue
  694a205f28dc coap-server.c: Fix proxy response type and code
  e8e33f0424ad coap-server: Add in POST support for unknown request handler
  3f5ec5467a1d coap_cache.c: Correctly build cache key
  e43cf9369ac5 RFC7959: Handle both client and server initiating requests
  bdf7686613ec coap_write_session: Account correctly for partial TCP writes
  76194be8cd3f coap-client.c: Allow time for all server responses to mcast
  d395df1a812f coap_session.c: Do not check for duplicate mids if reliable protocol
  73389b8192e8 handlers: Clarify which handlers are client only, server only or both
  df9071c93eff coap_session.[hc]: Added function to retrieve PSK identity from session
  7791897e8f4c api-version-bump.sh: Added missing changes for win32
  4834b86067ae pkg-config: Don't use hard coded binary
  d139beab67ff pkg-config: Don't use hard coded binary
  166ef51ed155 Windows: Update libcoap-2 objects to libcoap-3
  31722c208ac9 PSK: Make PSK hint / key / identity retrieval simpler
  d746fc24e5a7 coap_pdu_parse: Add to public API
  0aeb0d624797 doxygen: Tidy up Modules and Files tab information
  f026f5701ece client+server: Reduce code size by building libcoap for client or server only
  a7f53b4d6b0a coap_debug.h: Allow <syslog.h> to be included before and after <coap3/coap.h>
  77f8cf59702e DTLS/TLS: Support TLS when DTLS is not enabled
  587de900c2cc coap_mbedtls.c: Add in TLS support
  94b297aae7a5 coap_mbedtls.c: Fix build fail for client only mbedtls
  cc2648aef685 net.c: Protect against session release in coap_io_do_io()
  ca44071b8afe net.h: do not include sys/select.h in Windows builds
  e984f38b8fd6 [DTLS] make buffer sizes for psk and psk_identity configurable
  54dbc3eeb815 [RIOT] coap_time.h: fix COAP_TICKS_PER_SECOND for undefined XTIMER_HZ
  05e7f12d7ca8 net.h: Include sys/select.h for fd_set
  25a59905792f doxygen: Fix summary output for manual pages
  a5c0d12354ed doc: Document the coap_can_exit() function
  a1d78d505d98 tiny.c: Fix message id generation
  67f189f134a2 CMakeLists.txt: Fix macOS builds by checking for if_nametoindex support
  8ce139d349bc coap_event.h: Make coap_event_t an enum
  b0ca3ae643d1 resource.c: Delete previous subscription correctly
  98b9179d5666 async: Correct MID usage in response
  c61748f4dd33 RFC7959: session->lg_xmit not being released for a server
  482be755fe29 gnutls:  GNUTLS_CRT_RAW not defined
  e0d6477b5ec9 man: Update man page documentation
  d52986f00459 coap_resource_init: Leading '/' is not required for uri_path
  60c69557f3d5 pdu.h: Remove unassigned response code COAP_RESPONSE_CODE_OK
  87fab6d573cf coap_mbedtls.c: Allow ESP-IDF systems to be compiled without PSK support
  77d1aae06b17 Fix condition for MBEDTLS_INCLUDE_DIRS
  4bbf25ba338a coap-client: Add in support for generating multiple requests
  50530704df9a tinydtls: update to latest version

License-Update: Update year
Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

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