mq: prepare a strip extension for extraction
Strip will lives in its own extension. The extension is surprisingly called
`strip`. (as discussed in
issue3824) The `mq` extension force the use of the
strip extension when its enabled. This will both necessary for backward
compatibility (people expect `mq` to comes with strip) and become some utility
function used by `mq` will move in the strip extension.
from mercurial import cmdutil
cmdtable = {}
command = cmdutil.command(cmdtable)
testedwith = 'internal'