libnm-core: deprecate nm_utils_iface_valid_name()

We don't use it internally and a better version exists. Not like we
could drop it or anything.

libnm-core/nm-utils.c

@@ -3789,6 +3789,8 @@ nm_utils_is_valid_iface_name (const char *name, GError **error)
  *
  * Validate the network interface name.
  *
+ * Deprecated: 1.6: use nm_utils_is_valid_iface_name() insteead, with better error reporting.
+ *
  * Returns: %TRUE if interface name is valid, otherwise %FALSE is returned.
  */
 gboolean

libnm-core/nm-utils.h

@@ -177,6 +177,7 @@ gboolean    nm_utils_hwaddr_matches   (gconstpointer hwaddr1,
 char *nm_utils_bin2hexstr (gconstpointer src, gsize len, int final_len);
 GBytes *nm_utils_hexstr2bin (const char *hex);
 
+NM_DEPRECATED_IN_1_6_FOR(nm_utils_is_valid_iface_name)
 gboolean    nm_utils_iface_valid_name (const char *name);
 NM_AVAILABLE_IN_1_6
 gboolean    nm_utils_is_valid_iface_name (const char *name, GError **error);