Steve Borho <steve@borho.org> [Wed, 05 Dec 2007 22:57:35 -0600] rev 5619
win32: favor local mercurial.ini over registry key
Hopefully this is the best of both worlds. Multiple py2exe based
installers can coexist on one machine, while source and lib based
Mercurial users can still use a registry key in lieu of resorting to
HGRCPATH.