ancestor: improve docstring
The term "least common ancestor" is highly ambiguous.
run-tests: always set $COLUMNS, fix running tests under emacs shell
fix tests failure reported by Neal Becker.
hgweb: add support for extension-provided permission hooks
This allows extensions to hook into permission checking, providing both
authentication and authorization as needed. The existing authorization
function has been changed to a hook, which is added by default.
i18n-da: synchronized with
b5170b8b32a5