x11-fm/deforaos-browser: update to 0.6.0

While here, extent pkg-descr.

This release brings:

• Build fixes for macOS (when building without XQuartz)
• Fixes to the Git and Subversion plug-in
• New helper callbacks to the plug-in system
• Updated helper scripts from DeforaOS configure
• Support for compilation modes from DeforaOS configure
• Updated translations

Pull Request: https://github.com/freebsd/freebsd-ports/pull/274