Merged man pages next(1) and prev(1) into show(1).
Defined show(mime)proc locally and removed their profile entries. Their paths are relative now, too.
Reworked the man page system and some man page contents (mmh-intro). Now it's possible to have two equally named pages in two different sections. This appeared to be interesting for mmh(X), but I don't use it now. Let's see if we keep the new system or even rework it to become simpler.