Backup ipa-specific httpd unit-file

On backup-restore, the ipa unit file for httpd was not backed up.
This file however contains setting for httpd to communicate with
gssproxy so not backing it up will result in httpd not knowing
how to get credentials.

https://pagure.io/freeipa/issue/6748

Reviewed-By: Martin Basti <mbasti@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>

ipaserver/install/ipa_backup.py

@@ -166,6 +166,7 @@ class Backup(admintool.AdminTool):
         paths.KDC_CERT,
         paths.KDC_KEY,
         paths.SYSTEMD_IPA_SERVICE,
+        paths.SYSTEMD_SYSTEM_HTTPD_IPA_CONF,
         paths.SYSTEMD_SSSD_SERVICE,
         paths.SYSTEMD_CERTMONGER_SERVICE,
         paths.SYSTEMD_PKI_TOMCAT_SERVICE,

ipaserver/install/ipa_restore.py

@@ -414,6 +414,8 @@ class Restore(admintool.AdminTool):
                 sssd = services.service('sssd', api)
                 sssd.restart()
                 http.remove_httpd_ccaches()
+                # have the daemons pick up their restored configs
+                run([paths.SYSTEMCTL, "--system", "daemon-reload"])
         finally:
             try:
                 os.chdir(cwd)