revset: add option to make matcher takes the ordering of the input set
This allows us to evaluate match(subset) as if 'subset & expr', which will
be the complete fix for the issue5100.
$ 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