Manpage auto-generation

[Owez]

Manual pages should also be a primary post-release feature, perhaps a little further down the line then #5 as they are still frequently used in modern times. It should not have any message truncation (#2) etc and should be in the man-page format.

Not sure about if this should be a feature gate because the parsing complexity may be quite large due to specific manpage formatting requirements (i.e. the troff format).