irc/ircd-hybrid: Updates to 8.2.40

Changes since 8.2.39:

• • Noteworthy changes in version 8.2.40 (2022-07-02)
• 'channel::disable_fake_channels' now also blocks strikethrough text (0x1E (30))
• 'KNOCK' can now be used on private channels. Channel mode 'K' may be used instead to control whether or not 'KNOCK' is allowed on a channel.
• Support for '/dev/poll' has been dropped
• 'INFO' now also reports configured values of 'channel::default_join_flood_count' and 'channel::default_join_flood_time'
• The founder 'q' and admin 'a' channel prefix modes have been implemented. These are optional and can be enabled with the new 'channel::enable_owner' and 'channel::enable_admin' configuration directives.
• Channel half-ops may now kick other half-ops
• Extban '$K' of type acting has been implemented. This extban prevents matching users from using the 'KNOCK' command.
• Server-side channel mode locking 'MLOCK' has been implemented
• Fixed server name leak in 'WHOWAS' with 'serverhide::hide_services' enabled