[lint] only check for https with UpdateCheckMode HTTP
[lint] only check for https with UpdateCheckMode HTTP

With 133b626b UpdateCheckMode is now also allowed with Tags but it uses
the files from the local repo.

f-droid/fdroidserver,fdroidtravis/fdroidserver,fdroidtravis/fdroidserver,f-droid/fdroidserver,f-droid/fdroidserver,f-droid/fdroidserver,f-droid/fdroid-server,f-droid/fdroid-server,fdroidtravis/fdroidserver,f-droid/fdroid-server,fdroidtravis/fdroidserver,f-droid/fdroid-server,f-droid/fdroidserver,f-droid/fdroid-server