Fix default subscriber regexp

Incorrect regular expression used by default to authorize all
subscribers to implement authorization policy 'accept-all' prevented MS
from camping on the open network.

Change-Id: I20284b3d40ecf4ca1e67d8cd25afb8d5e4ae3025
diff --git a/openbsc/src/libbsc/net_init.c b/openbsc/src/libbsc/net_init.c
index 0e99097..ee0d445 100644
--- a/openbsc/src/libbsc/net_init.c
+++ b/openbsc/src/libbsc/net_init.c
@@ -27,7 +27,7 @@
 				     int (*mncc_recv)(struct gsm_network *, struct msgb *))
 {
 	struct gsm_network *net;
-	const char *default_regexp = "*";
+	const char *default_regexp = ".*";
 
 	net = talloc_zero(tall_bsc_ctx, struct gsm_network);
 	if (!net)