unshelve: don't commit unknown files during unshelve (
issue4113)
Previously, unshelve would temporarily commit unknown files (via addremove) in
an attempt to allow unshelving into unknown files. This produced unexpected
results, like the file time stamp changing and a .i file being created.
This change makes it no longer use addremove. It ignores unknown files
completely. If an unshelve would overwrite an unknown file, the unknown file is
moved to *.orig
The shelve continue/abort format is changed, but it just removes stuff from the
end of the file, so it can still read the old format.
$ 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