UnrealIRCd 5.2.3

This release contains a couple of small changes.

Important: From upstream's perspective, UnrealIRCd 6 is the new "stable", UnrealIRCd 5.2.x is now "oldstable".

Enhancements

• Spanish example conf was added (conf/help/example.es.conf)

Fixes

• set::anti-flood::connect-flood was only expiring entries every 2 minutes. Only after a REHASH the configuration file setting was used.
• Memory leak in websocket module
• Send WALLOPS back to the sender too

Changes

• Update HELPOP docs
• Add information on EOL date
• Add CONTRIBUTING.md file with a reference to docs on how people can help out.