irc/irssi: Update to 1.4.1

Changelog: https://github.com/irssi/irssi/releases/tag/1.4.1

Backport upstream commits from maintenance branch:
3404d822c83546b031d47a99e37ae65b887bec94
f17fb682573985656fa26bf10370b9e1d88e3bdf
c6a7f02042f63d01a38e8d522cff8f5d951afd51
730c3c1a12f782b92d710883f52a106e37f148e4
1b6b92ffff6950ee28c1b7936f53d83988843ed4

References:
https://github.com/ailin-nemui/irssi/commit/3404d822c83546b031d47a99e37ae65b887bec94
https://github.com/ailin-nemui/irssi/commit/f17fb682573985656fa26bf10370b9e1d88e3bdf
https://github.com/ailin-nemui/irssi/commit/c6a7f02042f63d01a38e8d522cff8f5d951afd51
https://github.com/ailin-nemui/irssi/commit/730c3c1a12f782b92d710883f52a106e37f148e4
https://github.com/ailin-nemui/irssi/commit/1b6b92ffff6950ee28c1b7936f53d83988843ed4

PR: 264628
Reviewed by: David O'Rourke <dor.bsd@xm0.uk> (maintainer)