changelog: add all major changes for 1.2.0

CHANGELOG.md

@@ -1,9 +1,38 @@
 # Changelog
 
 ## Unreleased
+
 ### Added
+* Run-time text resize using ctrl-+, ctrl+- and ctrl+0
+* Font size adjusts dynamically to outputs' DPI
+* Reflow text when resizing window
+* **pad** option to `footrc`
+* **login-shell** option to `footrc` and `--login-shell` command line
+  option
+* Client side decorations (CSDs). This finally makes foot usable on
+  GNOME.
+* Sixel graphics support
+* OSC 12 and 112 escape sequences (set/reset text cursor color)
+* REP CSI escape sequence
+* `oc` to terminfo
+* foot-server.desktop file
+* Window and cell size reporting escape sequences
+* `--hold` command line option
+* `--print-pid=FILE|FD` command line option
+
 ### Changed
+* Subpixel antialiasing is only enabled when background is opaque
+* Meta/alt ESC prefix can now be disabled with `\E[?1036l`. In this
+  mode, the 8:th bit is set and the result is UTF-8 encoded. This can
+  also be disabled with `\E[1024l` (in which case the Alt key is
+  effectively being ignored).
+* terminfo now uses ST instead of BEL as OSC terminator
+* Logging to print to stderr, not stdout
+* Backspace now emits DEL (^?), and ctrl+backspace emits BS (^H)
+
 ### Deprecated
 ### Removed
+* '28' from DA response
+
 ### Fixed
 ### Security