tests/test-mq-qsave.t

lfs: handle paths that don't end with '/' when inferring the blob store

While here, I also checked the lfs.url config directly instead of testing the
scheme, as requested by Yuya.

  $ echo "[extensions]" >> $HGRCPATH
  $ echo "mq=" >> $HGRCPATH

  $ hg init

  $ echo 'base' > base
  $ hg ci -Ambase
  adding base

  $ hg qnew -mmqbase mqbase

  $ hg qsave
  $ hg qrestore 2
  restoring status: hg patches saved state