MANPREFIX: eliminate its usage

While here move manpages to share/man

Remove WWW entries moved into port Makefiles

Commit b7f05445c00f has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.

This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.

Approved by:		portmgr (tcberner)

Add WWW entries to port Makefiles

It has been common practice to have one or more URLs at the end of the
ports' pkg-descr files, one per line and prefixed with "WWW:". These
URLs should point at a project website or other relevant resources.

Access to these URLs required processing of the pkg-descr files, and
they have often become stale over time. If more than one such URL was
present in a pkg-descr file, only the first one was tarnsfered into
the port INDEX, but for many ports only the last line did contain the
port specific URL to further information.

There have been several proposals to make a project URL available as
a macro in the ports' Makefiles, over time.

benchmarks: remove 'Created by' lines

A big Thank You to the original contributors of these ports:

  *  Alexander Logvinov <ports@logvinov.com>
  *  Alexey Dokuchaev <danfe@FreeBSD.org>
  *  Alexey V. Degtyarev
  *  Andreas Kohn <andreas@syndrom23.de>
  *  Andrew Shevtsov <nyxo@dnuc.polyn.kiae.su>
  *  Andrey Zakhvatov <andy@FreeBSD.org>
  *  Andy Clark <andrewclarkii@gmail.com>
  *  Antonio Carlos Venancio Junior (<antonio@inf.ufsc.br>)
  *  Bill Fumerola <billf@chc-chimes.com>
  *  Brad Davis <brd@FreeBSD.org>
  *  Bruce A. Mah <bmah@FreeBSD.org>

Remove # $FreeBSD$ from Makefiles.

Flush a short queue of minor non-functional changes sitting it my tree:
- Escape literal dot properly in sed(1) code (for REINPLACE_CMD)
- Spell "C-string" correctly in COMMENT and add a missing newline
- Use NULL for pointer in C code (original snippet was for C++ and Bjarne
  prefers to avoid macros, per his C++ Style and Technique FAQ)

- Drop requirement for linprocfs(5) to be mounted under /compat/linux/proc
- Use `do-install-DOCS-on' target for docs and perform some minor cleanups

Reclaim maintainership of ports that I still use regularly, but decided to
relinquish at some point to allow contributions coming more easily (not to
impose hard lock).  These days, there is no reason to yield maintainership
with the more lax rules and general consensus that casual changes do not
necessarily require explicit approval from maintainer prior to commit.

On the other hand, unmaintained ports can give (arguably false) impression
of being unwanted and one step above deprecation, yet these ports are not.

Inspired by:	marino

cat astro / benchmarks
- USE_(BZIP2|XZ) -> USES=tar:(bzip2|xz)
- adjust BSDn License

Mea culpa, forgot about the manual page (MAN8).

Switch to staging mode.

Add NO_STAGE all over the place in preparation for the staging support (cat:
benchmarks)

- Unbreak parallel builds by separating cleaning and building
- Sort the knobs a bit while I am here
- Remove the check for old, unsupported versions of FreeBSD
- Relinquish control of the port, it's pretty safe to fly solo

Reported by:	pointyhat-west

Install the manual page.

Regenerate patch to include the context and slightly reword port description
(no functional changes).

Interbench is an application designed to benchmark interactivity in Linux^W
Unix-like operating systems.

WWW: http://users.on.net/~ckolivas/interbench/