VMM/handler: Improved domaininfo subcommand. Check all labels for ASCII-compatible encoding, not only the first one. If something is in ACE format, convert it to IDNA.

# use glob syntax.
syntax: glob

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