[RFC] netconfig: Global option to send hostname with dhcp request for all networks

Add global option to send hostname with dhcp always with
[IPv4].SendHostnameAlways so the first DHCP request will include the
hostname on first connection and don't need to modify the .psk files
to add SendHostname after they are created.

---
diff --git a/src/iwd.config.rst b/src/iwd.config.rst
index 4ba7b4e7..4f473e07 100644
--- a/src/iwd.config.rst
+++ b/src/iwd.config.rst
@@ -429,6 +429,11 @@ The group ``[IPv4]`` contains settings related to
IPv4 network configuration.
        will limit the number of access points that can be running
        simultaneously on different interfaces.

+   * - SendHostnameAlways
+     - Values: true, **false**
+
+       Always send the hostname in the DHCP request for all networks.
+
 DriverQuirks
 ------------

diff --git a/src/netconfig.c b/src/netconfig.c
index cd19217c..5959a5ac 100644
--- a/src/netconfig.c
+++ b/src/netconfig.c
@@ -375,7 +375,9 @@ gateway:
    }

 send_hostname:
-   if (l_settings_has_key(active_settings, "IPv4", "SendHostname") &&
+   l_settings_get_bool(iwd_get_config(), "IPv4",
"SendHostnameAlways", &send_hostname);
+
+   if (!send_hostname && l_settings_has_key(active_settings, "IPv4",
"SendHostname") &&
            !l_settings_get_bool(active_settings, "IPv4",
                        "SendHostname",
                        &send_hostname)) {
@@ -391,13 +393,20 @@ send_hostname:
        goto mdns;
    }

-   if (send_hostname &&
-           !l_netconfig_set_hostname(netconfig->nc, hostname)) {
-       l_error("netconfig: l_netconfig_set_hostname() failed");
-       success = false;
-       goto mdns;
+   if (send_hostname) {
+       if (!l_netconfig_set_hostname(netconfig->nc, hostname)) {
+           l_error("netconfig: l_netconfig_set_hostname() failed");
+           success = false;
+       } else {
+           l_debug("netconfig: Hostname '%s' will be sent in DHCP
requests", hostname);
+       }
+   } else {
+       l_debug("netconfig: No hostname will be sent in DHCP requests");
    }

+   goto mdns;
+
+
 mdns:
    /* If the networks has this set take that over the global */
    if (l_settings_has_key(active_settings, "Network", "MulticastDNS")) {