serve: respect settings from .hg/hgrc
create_server was looking only at the root ui object, ignoring any
settings from .hg/hgrc. To keep respecting command-line arguments,
commands.serve must also call repo.ui.setconfig.
adding b rev offset length base linkrev nodeid p1 p2 0 0 3 0 0 1e88685f5dde 000000000000 000000000000