wip/ruby-gollum 6.1.0 NetBSD

Gollum is a simple wiki system built on top of Git. A Gollum Wiki is simply a git repository of a specific nature:

- A Gollum repository's contents are human-editable. Pages are
  unique text files which may be organized into directories any
  way you choose, as long as they have a recognized file
  extension. Other content can also be included, for example
  images, PDFs and headers/footers.
- Gollum pages:
    - May be written in a variety of markup languages.
    - Can be edited with your favourite system editor or IDE or
      with the built-in web interface.
    - Can be displayed in all versions, and can easily be rolled
      back.
- Gollum supports advanced functionality like UML diagrams,
  macros, metadata, and more.