Matt Harbison <matt_harbison@yahoo.com> [Tue, 17 Oct 2017 21:48:56 -0400] rev 34878
share: move the implementation of 'unshare' to the 'hg' module
This will be used to setup unsharing subrepos. Usually cmdutil is used for
this purpose. But the implementation needs hg.copystore(), and the hg module
already imports cmdutil.