use fancy .In macro for includes. from Jan Klemkow. ok jmc schwarze

convert to new .Dd format;

section reorder;

- typos
- new sentence, new line
- clean up .Xrs

Add FreeBSD tags

- remove all trailing whitespace
* except when it is escaped with a `\' at the end of the line
- fix remaining .Nm usage as well
- this is from a patch I received from kwesterback@home.com, who

- remove all trailing whitespace
* except when it is escaped with a `\' at the end of the line
- fix remaining .Nm usage as well
- this is from a patch I received from kwesterback@home.com, who has been
working on some scripts for fixing formatting errors in mdoc'd man pages

Ok, so there could be a cost/benefit debate with this commit, but since I have
the patch we might as well commit it...

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Removed extraneous comma in xrefs.

This is OpenBSD.

sync with FreeBSD (rwlock, gc thread, man pages)
add (broken) mips md stuff
fix some const warnings
add sigaltstack() stub
another hash at getting shlib auto-init to work (mips/elf and i386/a.out)