Log Message:
www/trac: Update to 1.4.2

(Update prepared in wip by Matthias Petermann)

Upstream changes:

* Jinja2 is the template engine, providing performance improvements
  over Genshi. Genshi is still supported until Trac 1.5.1 for rendering
  plugin templates.

* Custom navigation items can be added to the main and meta navigation.

* TracAdmin convert_db command for converting to a new database backend
  while preserving all environment data.

* Restyled wiki that allows toggling between narrow and full width.

* HTTPS support for TracStandalone (tracd)

* Lots of minor bug fixes and improvements

For full change log please refer to:

		https://trac.edgewall.org/wiki/TracChangeLog