textproc/hevea: Update 2.36 => 2.38, improve port, take maintainership
- Add LICENSE, LICENSE_FILE and LICENSE_PERMS for QPL-1.0
- Add EXAMPLES option for installing examples
- Suggest local TeX folder for style installation in pkg-message
- Pet portclippy(1) and portfmt(1)
Approved by: db@, yuri@ (Mentors, implicit)