~aleteoryx/sexchat

ref: 3cb6ffdf76c8a7b4d76f21f0ba22c1ea94e28ba8 sexchat/src/common d---------
dynamic dispatch refactored
rename struct server -> struct ircconn
Merge branch 'bugfix'
remove all references to fe_* from server.c, other than ctor/dtor
remove all mentions of struct session from server.c
restrict self-sent CTCP handling
remove gui_ulist_style option

this is a suboptimal solution, but a more advanced theming system should be worked on later

Fixes: https://todo.amehut.dev/~aleteoryx/sexchat/12
remove usermenu
add msgid to xtext and scrollback
Merge branch 'bugfix'
always log tabs to disk scrollback
Merge branch 'bugfix'
fix topicbar changing to local user in dms
support for ircv3 echo-message
soju compatibility in DMs
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