Change name of "Sysop Chat Requirements" option to "Sysop Chat Override".

Hopefully this more clearly describes what this feature is used for.

src/sbbs3/scfg/scfgsys.c

@@ -1106,7 +1106,7 @@ user.
 					,cfg.sys_lastnode);
 				sprintf(opt[i++],"%-27.27s%s","Phone Number Format"
 					,cfg.sys_phonefmt);
-				sprintf(opt[i++],"%-27.27s%.40s","Sysop Chat Requirements"
+				sprintf(opt[i++],"%-27.27s%.40s","Sysop Chat Override"
 					,cfg.sys_chat_arstr);
 				if(cfg.user_backup_level)
 					sprintf(str,"%hu",cfg.user_backup_level);
@@ -1347,7 +1347,7 @@ format. An example for North American phone numbers is 
NNN-NNN-NNNN
.
 							,LEN_PHONE,K_UPPER|K_EDIT);
                         break;
 					case 13:
-						getar("Sysop Chat",cfg.sys_chat_arstr);
+						getar("Sysop Chat Override",cfg.sys_chat_arstr);
 						break;
 					case 14:
 						SETHELP(WHERE);