hooks: forbid ':' in hook name
The `:` character is a special separator in the config and it seems same do to
the same for hooks. This is necessary to improve the experience around the
HGPLAIN behavior change in 5.7. See next changesets for details.
Differential Revision: https://phab.mercurial-scm.org/D9978
rust-status: honor matcher when using the dirstate-only fast-path (
issue6483)
Differential Revision: https://phab.mercurial-scm.org/D9977