localrepo/branchcache: remove lbranchmap(), convert users to use utf-8 names
We don't need a "local-charset" aware branchmap() function, we can convert the
names when needed during the output.
inserv1
% inserve
adding a
adding b
adding c
adding d
adding e
adding f
adding hg.pid
M c
A g
A h
R a
R e
! b
Are we able to kill the service? if not, the service died on some error