Merge MR 'Improve cl_autodemo_delete description'

See merge request https://gitlab.com/xonotic/darkplaces/-/merge_requests/162

Signed-off-by: bones_was_here <bones_was_here@xonotic.au>

cl_main.c

@@ -61,7 +61,7 @@ cvar_t freelook = {CF_CLIENT | CF_ARCHIVE, "freelook", "1","mouse controls pitch
 
 cvar_t cl_autodemo = {CF_CLIENT | CF_ARCHIVE, "cl_autodemo", "0", "records every game played, using the date/time and map name to name the demo file" };
 cvar_t cl_autodemo_nameformat = {CF_CLIENT | CF_ARCHIVE, "cl_autodemo_nameformat", "autodemos/%Y-%m-%d_%H-%M", "The format of the cl_autodemo filename, followed by the map name (the date is encoded using strftime escapes)" };
-cvar_t cl_autodemo_delete = {CF_CLIENT, "cl_autodemo_delete", "0", "Delete demos after recording.  This is a bitmask, bit 1 gives the default, bit 0 the value for the current demo.  Thus, the values are: 0 = disabled; 1 = delete current demo only; 2 = delete all demos except the current demo; 3 = delete all demos from now on" };
+cvar_t cl_autodemo_delete = {CF_CLIENT, "cl_autodemo_delete", "0", "3: automatically delete every newly recorded demo unless this cvar is set to 2 during a game, in case something interesting happened (cvar will be automatically set back to 3);  0: keep every newly recorded demo unless this cvar is set to 1 during a game, in case nothing interesting happened (cvar will be automatically set back to 0).  Technically speaking, the value is a bitmask: bit 1 defines behaviour for all demos, bit 0 overrides behaviour for the demo currently being recorded" };
 cvar_t cl_startdemos = {CF_CLIENT | CF_ARCHIVE, "cl_startdemos", "1", "1 enables the `startdemos` loop used in Quake and some mods, 0 goes straight to the menu"};
 
 cvar_t r_draweffects = {CF_CLIENT, "r_draweffects", "1","renders temporary sprite effects"};