py3: return bytes from util.removeauth() util.hidepassword() also returns bytes and we should deal in bytes as much as possible. This makes test-logexchange.t pass on Python 3.5 Differential Revision: https://phab.mercurial-scm.org/D3127

test-convert-git.t
test-subrepo-git.t
test-patchbomb-tls.t