verify: if downloading from /repo/ fails, try /archive/
verify: if downloading from /repo/ fails, try /archive/

The Builds entries in metadata/ files do not easily say whether a
given APK is in the repo/ or the archive/.  So it should also try to
download the official APK from the archive/ when verifying.

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