UnrealIRCd 5.2.2

Fixes

• Fix issues with Let's Encrypt certificates for remote includes (quite common) and with linking to servers with link::verify-certificate enabled (more rare). Both issues only happen with:
  • OpenSSL 1.0.2 and older, which is officially unsupported, but still in use on e.g. Debian 8 and Ubuntu 16.04.
  • LibreSSL, such as with UnrealIRCd on Windows
• OpenBSD compile issue when using shipped c-ares

Enhancements

• set::allowed-nickchars: added arabic-utf8
• set::server-linking: add another autoconnect-strategy called sequential-fallback

Module coders / IRC protocol

• S2S: Allow SVSLOGIN also when set::sasl-server is not set.
• Some minor CHATHISTORY fixes, for example the subcommand is now case-insensitive.
• You can use the new UNREAL_VERSION macro. It is easier than the old individual UNREAL_VERSION_MAJOR/MINOR/etc macros.