hgwebdir: ignore hgrc parse errors while building the index page
An error in the .hg/hgrc file from a repository would prevent the
following repos from being shown in the index page.
The IOError handling was unnecessary - it's already handled in
readconfig.
This should fix issue731.
The error in the .hg/hgrc file will still prevent the repo from
being exported with hgweb.
Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
See http://www.selenic.com/mercurial/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.