add MAXPLAYERS to SYSCF (trunk only)

Add MAXPLAYERS to SYSCF config file; deprecate (but continue to support)
 MAX_NR_OF_PLAYERS in nethack.sh since it is trivially overridden in many
 (all?) cases and isn't useful for ports that don't use nethack.sh.

src/files.c

@@ -2078,6 +2078,15 @@ int		src;
 	    if(sysopt.recover) free(sysopt.recover);
 	    sysopt.recover = alloc(strlen(bufp));
 	    (void) strcpy(sysopt.recover, bufp);
+	} else if ( (src==SET_IN_SYS) && match_varname(buf, "MAXPLAYERS", 10)) {
+	    int temp = atoi(bufp);
+		/* XXX to get more than 25, need to rewrite all lock code */
+	    if(temp > 0 && temp <= 25){
+		    sysopt.maxplayers = temp;
+	    } else {
+		raw_printf("Illegal value in MAXPLAYERS.");
+		return 0;
+	    }
 #endif
 	} else if (match_varname(buf, "BOULDER", 3)) {
 	    (void) get_uchars(fp, buf, bufp, &iflags.bouldersym, TRUE,

src/sys.c

@@ -14,5 +14,6 @@ sys_early_init(){
 	/* replace use of WIZARD vs WIZARD_NAME vs KR1ED, by filling this in */
 #endif
 	sysopt.wizards = NULL;
+	sysopt.maxplayers = 0;	/* XXX eventually replace MAX_NR_OF_PLAYERS */
 }