Update the CHANGELOG for the upcoming 7.41 release.

CHANGELOG

@@ -1,3 +1,19 @@
+Quake II 7.40 to 7.41:
+- Some bugfixes to HTTP downloads introduced in 7.40.
+- Fix several crashed when loading savegames in coop games.
+- Fix some out of memory aborts when loading maps with a lot surfaces.
+- Allow autodetection of the desktop resolution. Set 'r_mode' to '-2' to
+  enable that. (by Denis Pauk)
+- Several fixes to the OpenGL 3.2 renderer. Some dynamic lights were
+  missing, for example for most explosions. Stencil shadows were broken
+  under some conditions. Performance was bad with the AMD legacy driver
+  under Windows. Under some conditions lights were too bright.
+- Add an optional fix for lighting problems in maps that missuse sky
+  surfaces for interior lighting. Set 'gl_fixsurfsky' to '1' to enable
+  it.
+- Another bunch of timing fixes. The game should now hold the framerate
+  under all conditions, even under Windows with crappy GPU drivers.
+
 Quake II 7.30 to 7.40:
 - Add support for HTTP downloads. Both the r1q2 and q2pro URL schemes
   are supported, if a file is unavailable over HTTP the download code