Erlang/OTP 28 includes substantial modifications in ASN.1 support in the public_key library.

This has affected ejabberd and its libraries, let's summarize the relevant issues, commits and their progression:

• fast_xml
  ✅ solved in processone/fast_xml@7397696
• xmpp
  ✅ solved in processone/xmpp@020a1fa
• jose doesn't support #'ECPrivateKey'{version = ecPrivkeyVer1
  ✅ workaround in ejabberd added in commit 363351b
• p1_acme: undefined macro 'pkcs-9-at-extensionRequest' reported in p1_acme issue 3
  ✅ OTP-28.0.1 reintroduced the missing macro
• p1_acme {function_clause, [{public_key,get_asn1_module, ['SubjectAltName'], is reported in p1_acme issue 4
  ❌ Problem not yet solved in OTP 28.0.1; there's a PR awaiting inclusion in OTP that will probably solve this