Log warning on very large cachesize config, instead of truncating it.

src/dnsmasq.c

@@ -740,7 +740,11 @@ int main (int argc, char **argv)
   else 
     {
       if (daemon->cachesize != 0)
-	my_syslog(LOG_INFO, _("started, version %s cachesize %d"), VERSION, daemon->cachesize);
+	{
+	  my_syslog(LOG_INFO, _("started, version %s cachesize %d"), VERSION, daemon->cachesize);
+	  if (daemon->cachesize > 10000)
+	    my_syslog(LOG_WARNING, _("cache size greater than 10000 may cause performance issues, and is unlikely to be useful."));
+	}
       else
 	my_syslog(LOG_INFO, _("started, version %s cache disabled"), VERSION);
 

src/option.c

@@ -2603,8 +2603,6 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
 	    
 	    if (size < 0)
 	      size = 0;
-	    else if (size > 10000)
-	      size = 10000;
 	    
 	    daemon->cachesize = size;
 	  }