Largely a bug fix release: https://hexchat.readthedocs.io/en/latest/changelog.html

• rename data files to use io.github.Hexchat name
• add option (irc_reconnect_rejoin) to disable auto-rejoin on reconnect
• add ability to set custom tray icon separate of app icon
• fix Enchant 2.0+ support
• fix input box theming with Adwaita-dark
• fix custom sounds not respecting omit if away option
• fix detecting if a tray doesn't exist on x11
• fix cutting off ctcp text after ending \01
• fix /ignore not accepting full hosts
• fix characters getting cut off when their width changes (on Unix)
• fix various possible crashes
• change preference window to be scroll-able
• remove ctrl+w binding by default
• doat: fix channels with / in them
• fishlim: fix key exchange
• sysinfo: fix pci.ids file not being found on some distros
• sysinfo: make libpci optional
• lua: avoid loading the same script multiple times
• update translations