Add sysconf BONES_POOLS to allow more bones-files per level

Reduce the chance of a player playing on a public server encountering
their own bones, by implementing separate bones pools. The pool a player
belongs to is determined at game start, and only bones in that pool
are used. The sysconf BONES_POOLS allows the sysadmin to define how
many pools there are.

src/files.c

@@ -704,6 +704,10 @@ d_level *lev;
         Sprintf(dptr, ".%c", sptr->boneid);
     else
         Sprintf(dptr, ".%d", lev->dlevel);
+#ifdef SYSCF
+    if (sysopt.bones_pools > 1)
+        Sprintf(eos(file), ".%d", (ubirthday % sysopt.bones_pools));
+#endif
 #ifdef VMS
     Strcat(dptr, ";1");
 #endif
@@ -2278,6 +2282,9 @@ int src;
         if (sysopt.genericusers)
             free((genericptr_t) sysopt.genericusers);
         sysopt.genericusers = dupstr(bufp);
+    } else if (src == SET_IN_SYS && match_varname(buf, "BONES_POOLS", 10)) {
+        n = atoi(bufp);
+        sysopt.bones_pools = (n < 0) ? 0 : n;
     } else if (src == SET_IN_SYS && match_varname(buf, "SUPPORT", 7)) {
         if (sysopt.support)
             free((genericptr_t) sysopt.support);

src/sys.c

@@ -40,6 +40,7 @@ sys_early_init()
     sysopt.explorers = (char *) 0;
     sysopt.genericusers = (char *) 0;
     sysopt.maxplayers = 0; /* XXX eventually replace MAX_NR_OF_PLAYERS */
+    sysopt.bones_pools = 0;
 
     /* record file */
     sysopt.persmax = PERSMAX;