Log Message:
Update to 1.9.2:

This is a regular bugfix release (slightly early due to travel plans).

    commands: clarify that 'hg heads foo' shows heads on branch foo
    dispatch: don't rewrap aliases that have the same definition
    graphlog: attempt to fix index overrun (issue2912)
    http: pass user to readauthforuri() (fix 4a43e23b8c55)
    http: strip credentials from urllib2 manager URIs (issue2885)
    parsers: avoid pointer aliasing
    subrepo: fix cloning of repos from urls without slash after host (issue2970)
    ui: pass ' ' to raw_input when prompting
    url: really handle urls of the form file:///c:/foo/bar/ correctly