Rename daemon() to start_daemon().

daemon() conflicted with the standard library function, which is
included by default on OS X.

rogue4/daemon.c

@@ -61,10 +61,10 @@ register int (*func)();
 }
 
 /*
- * daemon:
+ * start_daemon:
  *	Start a daemon, takes a function.
  */
-daemon(func, arg, type)
+start_daemon(func, arg, type)
 int (*func)(), arg, type;
 {
     register struct delayed_action *dev;