chgserver: catch RepoError while loading configuration Recent share safe work introduced functionality to read share source config file on dispatch. This can result in RepoError while reading config file as the shared source might not be present. `test-share.t#safe` was failing with chg earlier because of this. Differential Revision: https://phab.mercurial-scm.org/D9462

registrar: clarify the documentation about some byte strings being required I *thought* these needed to be byte strings, but didn't remember and had to search out examples. Differential Revision: https://phab.mercurial-scm.org/D9489