utils: let make_ui return an empty ui.ui() object if the requested hgrc file isn't present 89c30b145bb8 lost an "if repoui" in simplehg, and Kallithea would thus fail on serving repos without a .hg/hgrc : File ".../kallithea/lib/middleware/simplehg.py", line 285, in _augment_hgrc for k, v in repoui.configitems(section): AttributeError: 'bool' object has no attribute 'configitems' It is *only* simplehg that invoke make_ui with read_from 'file'. In this case it could return False if the requested file wasn't present. It was odd and inconsistent that make_ui with read_from 'file' either returned an ui object or the value False. To fix the problem, just let make_ui return the empty ui.ui() if no .hg/hgrc is present. An ui object that just doesn't have any config sections is much better than any alternative.