n-dhcp4: re-import git-subtree for 'src/n-dhcp4'

git subtree pull --prefix src/n-dhcp4 git@github.com:nettools/n-dhcp4.git master --squash

src/n-dhcp4/src/libndhcp4.sym

@@ -26,6 +26,7 @@ global:
         n_dhcp4_client_pop_event;
         n_dhcp4_client_update_mtu;
         n_dhcp4_client_probe;
+        n_dhcp4_client_set_log_level;
 
         n_dhcp4_client_probe_free;
         n_dhcp4_client_probe_get_userdata;

src/n-dhcp4/src/meson.build

@@ -44,7 +44,6 @@ libndhcp4_shared = shared_library(
         soversion: 0,
         link_depends: libndhcp4_symfile,
         link_args: [
-                '-Wl,--no-undefined',
                 '-Wl,--version-script=@0@'.format(libndhcp4_symfile)
         ],
 )

src/n-dhcp4/src/test-run-client.c

@@ -597,7 +597,7 @@ static int parse_argv(int argc, char **argv) {
                         break;
 
                 case ARG_REQUESTED_IP:
-                        r = inet_aton(optarg, &main_arg_requested_ip);
+                        r = inet_pton(AF_INET, optarg, &main_arg_requested_ip);
                         if (r != 1) {
                                 fprintf(stderr,
                                         "%s: invalid requested IP -- '%s'\n",