irc/ircd-hybrid: Updates to 8.2.38

Changes since 8.2.37:

• • Noteworthy changes in version 8.2.38 (2021-01-17)
• Backwards compatibility mode for ircd-hybrid 8.2.22 and below has been removed
• Minimum supported version of the Anope IRC services is now 2.0.8
• Fixed displaying issue with channel MODE messages
• Characters valid for user names for local clients are now [A-Za-z0-9._-]. 'Special' characters like }|{'^]\[$, that were allowed previously, are no longer valid. Also user names may not begin with '.', '_', or '-'.
• The 'general::dots_in_ident' configuration directive has been renamed to 'general::specials_in_ident' and now covers the '-' and '_' characters in addition to '.'
• Fixed issue with clients connected from IPv6 localhost that, depending on the system's getaddrinfo() implementation, could lead to a crash of remote servers