Log Message:
Update to 2.6.1:

This is an unscheduled bugfix release to address some minor regressions in the \ 
2.6 release.

    convert: fix bug of wrong CVS path parsing without port number (issue3678)
    help/config: note 64-bit Windows registry key used with 32-bit Python
    hfs+: rewrite percent-escaper (issue3918)
    hgignore: fix regression with hgignore directory matches (issue3921)
    highlight: fix page layout with empty first and last lines
    largefiles: check existence of the file with case awareness of the filesystem
    largefiles: check unknown files with case awareness of the filesystem
    pathencode: grow buffers to increase safety margin
    revert: ensure that copies and renames are honored (issue3920)
    subrepo: open files in 'rb' mode to read exact data in (issue3926)
    windows: check target type before actual unlinking to follow POSIX semantics