hooks: fix pre- and post- hooks specified in .hg/hgrc We were looking up hooks in the wrong ui object. Also, we weren't handling hooks to commands without a repo.

[PATCH] zsh_completion tag/mq fixes Been using these for almost a month now without problems, so I figured some other people might want them. This allows the zsh completion to work with tags and mq patch names containing spaces, and adds support for qgoto.

tests: Use /bin/sh for test-journal-exists, /bin/bash may not be available