Use path relative to document root as reponame if published via a web server.
The full path is still displayed when using 'hg serve'.
Sort items in each hgrc section. Add web/description.
Reverted changeset
e254bcbfe636e97301f76c7da241b07be14f3d36
Volker Kleinfeld agreed that this is dead code and tried to fix a problem
which was already fixed somewhere else.