avs_commons 5.4.0

BREAKING CHANGES

• Default POSIX socket implementation now doesn't include errno.h if
  definition of EDOM (available by e.g. including lwIP's lwip/errno.h)
  is included in AVS_COMMONS_POSIX_COMPAT_HEADER.

Improvements

• Made MD5 length define publicly visible (for easier avs_stream_md5 usage)
• Made (D)TLS session resumption and persistence possible on Mbed TLS 3.0+ even
  when MBEDTLS_SSL_SRV_C is disabled

Bugfixes

• Added missing null guards in (D)TLS socket implementations so that all methods
  are now safe to call in any state
• When using lwIP, default POSIX socket implementation and appropriate compat
  header now include lwIP's lwip/errno.h instead of system errno.h