clean up whitespace, formatting, copyrights

major terraform (this is MUCH more than a rototill :-), including:
- update for 1.5 (still more MD stuff to check)
- use new macros in ../common/macros as appropriate
- introduce some CONSISTENCY bet

major terraform (this is MUCH more than a rototill :-), including:
- update for 1.5 (still more MD stuff to check)
- use new macros in ../common/macros as appropriate
- introduce some CONSISTENCY between the various ports' install docs
- use various mdoc macros as appropriate, including .Li, .Pa, .Sy, and .Ic.
- migrate more stuff into ../common/*
- whitespace cleanup
- lots of other little things i'm sure...

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Markup for -mdoc and -mdoc2html.

RCS Id Police.

Various corrections, additions and reformatting.

First go at alpha install notes.