login page footer: added server url

https://git.hammerle.me/fphammerle/carddavmate/commit/c989d9ad55853f34d7d9b20937c5e25437258d7c

cache.manifest

@@ -1,5 +1,5 @@
 CACHE MANIFEST
-#V 20201125163305
+#V 20201125163324
 
 CACHE:
 common.js

main.js

@@ -1118,6 +1118,10 @@ function globalMain()
 	}
 	$('#LoginPage').find('.footer').attr('title', globalVersion);
 
+	var server_info_tag = $('<div>Server: </div>');
+	server_info_tag.append($('<a>', {href: globalNetworkCheckSettings.href}).append(globalNetworkCheckSettings.href));
+	$('#LoginPage').find('.footer').append(server_info_tag);
+
 	if(isAvaible('CardDavMATE'))
 		globalMainCardDAV();
 	if(isAvaible('CalDavZAP'))