Gave original warm-up period in XPM, but kept shortened warm-up for defaults

sv_xon.cfg

@@ -37,6 +37,8 @@ g_maplist ""
 g_maplist_shufflenow
 // Warm up is a good feature, keeping it in all modes except XDF.
 g_warmup 1
+// Average pub doesn't realize there is a warm-up - shorten.
+g_warmup_limit 120
 // Convenient reset from Duel.
 g_maxplayers 0
 // Turn off demo recording in the common case.

sv_xpm.cfg

@@ -13,4 +13,7 @@ g_spawn_furthest 1
 g_chat_nospectators 2
 
 // Add minutes to the clock if there is a tie.
-timelimit_overtimes -1
+timelimit_overtimes -1
+
+//Permit longer warm-up in XPM
+g_warmup_limit 0