VMM/cli/clihelp: Two small improvements: - Unified `wild card search' help messages. - Added a comment for xgettext, so it should no longer make a wrong decision about `python-format'.

# use glob syntax.
syntax: glob

*~
*.py?
.*.swp
.swp
build
debian/vmm
debian/*.log
debian/*.debhelper
debian/files
debian/*substvars
.pc
*.egg-info