sync: Fix parsing of gcrypt::rsync:// urls that use a relative path

Such an url is not valid; parseURI will fail on it. But git-annex doesn't
actually need to parse the url, because all it needs to do to support
syncing with it is know that it's not a local path, and use git pull and
push.

(Note that there is no good reason for the user to use such an url. An
absolute url is valid and I patched git-remote-gcrypt to support them
years ago. Still, users gonna do anything that tools allow, and
git-remote-gcrypt still supports them.)

Sponsored-by: Jack Hill on Patreon

Assistant/WebApp/Gpg.hs

@@ -110,5 +110,5 @@ checkGCryptRepoEncryption location notencrypted notinstalled encrypted =
  - Only works if the gcrypt repo was created as a git-annex remote. -}
 probeGCryptRemoteUUID :: String -> Annex (Maybe UUID)
 probeGCryptRemoteUUID repolocation = do
-	r <- inRepo $ Git.Construct.fromRemoteLocation repolocation
+	r <- inRepo $ Git.Construct.fromRemoteLocation repolocation False
 	GCrypt.getGCryptUUID False r