vty: Add command to show detailed MS info

This commit extends the "show ms" command to display an extended set
of information for a single MS.

The following VTY commands are added:

- show ms tlli TLLI
- show ms imsi IMSI

Sponsored-by: On-Waves ehf
diff --git a/src/pcu_vty_functions.h b/src/pcu_vty_functions.h
index 89c5f82..1f4ad91 100644
--- a/src/pcu_vty_functions.h
+++ b/src/pcu_vty_functions.h
@@ -29,6 +29,10 @@
 
 int pcu_vty_config_write_pcu_ext(struct vty *vty);
 int pcu_vty_show_ms_all(struct vty *vty, struct gprs_rlcmac_bts *bts_data);
+int pcu_vty_show_ms_by_tlli(struct vty *vty, struct gprs_rlcmac_bts *bts_data,
+	uint32_t tlli);
+int pcu_vty_show_ms_by_imsi(struct vty *vty, struct gprs_rlcmac_bts *bts_data,
+	const char *imsi);
 
 #ifdef __cplusplus
 }