Make critbit the default hasher.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@4540 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/varnishd.c

@@ -529,7 +529,7 @@ main(int argc, char * const *argv)
 	const char *l_arg = "80m";
 	uintmax_t l_size;
 	const char *q;
-	const char *h_arg = "classic";
+	const char *h_arg = "critbit";
 	const char *M_arg = NULL;
 	const char *n_arg = NULL;
 	const char *P_arg = NULL;