Small cleanups to backout command:
- Accept -m for --message (like commit and similar commands), too.
- Don't ignore --logfile option.
- Fix command table entry (synopsis, group commit related option)
syntax: glob
*.elc
*.orig
*.rej
*~
*.so
*.pyc
*.swp
*.prof
tests/.coverage*
tests/annotated
tests/*.err
build
dist
doc/*.[0-9]
doc/*.[0-9].gendoc.txt
doc/*.[0-9].{x,ht}ml
MANIFEST
patches
mercurial/__version__.py
syntax: regexp
^\.pc/