Bump version, update NEWS

NEWS

@@ -1,10 +1,12 @@
-Unreleased
+2.4.0 (2026-09-04) "Complete"
 
  * xC: general.relay_bind is now a string array
 
  * xC: after the last release, added back a C-t binding to transpose characters,
    and M-Enter to insert newlines
 
+ * xC: removed Readline hacks from the fancy-prompt.lua plugin
+
  * xC + all frontends: adjusted key bindings, most notably:
     - changed M-a to prioritize highlights when looking for activity;
     - added M-A to look for buffers in reverse order;
@@ -14,6 +16,8 @@ Unreleased
 
  * xF: reached rough feature parity with xC and xP
 
+ * xF: X11: now optionally colour-managed using lcms2, improved IME integration
+
  * xP: fixed channel title layout for narrow browser windows
 
 
@@ -298,7 +302,7 @@ Unreleased
 
  * xC: don't show remembered channel modes on parted channels
 
- * xC: fix highlight detection in colored text
+ * xC: fix highlight detection in coloured text
 
  * xC: fix CTCP handling for the real world and don't decode X-QUOTEs
 
@@ -401,7 +405,7 @@ Unreleased
 
  * xC: nicknames in /names are now ordered
 
- * xC: nicknames now use the 256-color terminal palette if available
+ * xC: nicknames now use the 256-colour terminal palette if available
 
  * xC: now we skip entries in the "addresses" list that can't be resolved
    to an address, along with displaying a more helpful message

xK-version

@@ -1 +1 @@
-2.3.0
+2.4.0