merge with stable

alias: make shadowing behavior more consistent (issue2054) Currently, given an alias like the following: [alias] summary = summary --remote The alias might be executed - or it might not - depending on the order of the cmdtable dict. This happens because cmdalias gets assigned back to the cmdtable like so: cmdtable['summary'] = ... Yet '^summary|sum' is still in the table, so which one cmdutil.findcmd() chooses isn't deterministic. This patch makes cmdalias assign back to '^summary|sum'. It uses the same cmdtable key lookup that extensions.wrapcommand() does.

hgweb: handle exception of misconfigured path on index page If hgweb.config contains wrong path mapping, hgweb causes internal server error on repository index page. This patch changes makeindex() to ignore RepoError, because it looks to be designed to suppress configuration error.