core: add function nm_utils_ip6_address_clear_host_address()

Signed-off-by: Thomas Haller <thaller@redhat.com>

src/NetworkManagerUtils.h

@@ -35,6 +35,9 @@
 
 gboolean nm_ethernet_address_is_valid (const struct ether_addr *test_addr);
 
+in_addr_t nm_utils_ip4_address_clear_host_address (in_addr_t addr, guint8 plen);
+void nm_utils_ip6_address_clear_host_address (struct in6_addr *dst, const struct in6_addr *src, guint8 plen);
+
 int nm_spawn_process (const char *args);
 
 gboolean nm_match_spec_string (const GSList *specs, const char *string);