devel/libpololu-avr 151002_2

*: Bump PORTREVISIONs for math/mpc update to 1.3.1

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.

This commit implements such a proposal and moves one of the WWW: entries
of each pkg-descr file into the respective port's Makefile. A heuristic
attempts to identify the most relevant URL in case there is more than
one WWW: entry in some pkg-descr file. URLs that are not moved into the
Makefile are prefixed with "See also:" instead of "WWW:" in the pkg-descr
files in order to preserve them.

There are 1256 ports that had no WWW: entries in pkg-descr files. These
ports will not be touched in this commit.

The portlint port has been adjusted to expect a WWW entry in each port
Makefile, and to flag any remaining "WWW:" lines in pkg-descr files as
deprecated.

Approved by:		portmgr (tcberner)

One more small cleanup, forgotten yesterday. Reported by:	lwhsu

Remove # $FreeBSD$ from Makefiles.

devel/libpololu-avr: unbreak on powerpc64

Builds fine.

Approved by:	mentors (implicit approval)

Bump PORTREVISIONs of all users of math/mpc that we just updated to version 1.1.0 (via revision 464079).

Mark some ports failing on power64.  In cases where the error message was a stub, provide a real one.

While here, pet portlint.

Approved by:	portmgr (tier-2 blanket)

Switch libpololu-avr port to GitHub sources.

The zip files released on the Pololu website confuse portscout
(which thinks there should be a new version every day!) and use a
non-standard directory hierarchy, which requires WRKSRC to be set.
Switching to the GitHub releases (which are created by the same company,
just using GitHub mechanisms) solves both of these problems.

Also, fix some problems pointed out by mat (thanks!) that I ought to have
caught earlier by running `portlint -A`. :(

Approved by:	mat
Differential Revision:	https://reviews.freebsd.org/D7879

Update to v151002.

Approved by:	mat (portmgr)
Differential Revision:	https://reviews.freebsd.org/D6339

Remove ${PORTSDIR}/ from dependencies, categories d, e, f, and g.

With hat:	portmgr
Sponsored by:	Absolight

Add new port: devel/libpololu-avr.

This is a library used to control Pololu AVR-based robots such as the
Pololu 3pi (used for introductory programming education at Memorial
University of Newfoundland and, I believe, other places too).

Approved by:	mat
Differential Revision:	https://reviews.freebsd.org/D2622