gsm23003: Add MME domain name related helper functions

osmo_gen_mme_group_domain(), osmo_gen_mme_group_domain() and
osmo_gen_home_network_domain()

Change-Id: Ia882d9db05ec0037e593aeebea21bc31adb680bb
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 3cc2ec5..4813e13 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -315,9 +315,15 @@
 osmo_rai_name;
 osmo_cgi_name;
 osmo_cgi_name2;
+osmo_gummei_name;
 osmo_mnc_from_str;
 osmo_mnc_cmp;
 osmo_plmn_cmp;
+osmo_gen_home_network_domain;
+osmo_parse_home_network_domain;
+osmo_gen_mme_domain;
+osmo_parse_mme_domain;
+osmo_gen_mme_group_domain;
 gsm48_chan_mode_names;
 gsm_chan_t_names;
 gsm48_pdisc_names;