Update default.cfg to add comment for k_ctf_based_spawn

sv-configs/ktx/configs/usermodes/ctf/default.cfg

@@ -2,7 +2,7 @@
 watervis 1 // turn on watervis for CTF
 k_ctf_runes 1 // allow runes
 k_ctf_hook 1 // allow hook
-k_ctf_based_spawn 0
+k_ctf_based_spawn 0 // 0 = can spawn anywhere (except first spawn which is in base), 1 = always spawn in base
 set k_ctf_cr_hook 1
 set k_ctf_hurt_items 1
 pm_airstep 0 // turn off jumping up stairs