biology/libgff2.0.1

Release numerous ports to ports@

I've been retired for a few years, and it is unlikely I will be doing
any more scientific computing support in the future.  I have continued
to maintain ~160 ports to the best of my ability, mainly as a favor to
the community, but I can no longer justify the time and effort
required.  I am therefore releasing most of my scientific ports, along
with a few others, to ports@.  I will continue to maintain ports I am
actively using and those for which I am upstream.

biology/libgff: Update to 2.0.1

Basic security fix: sprintf -> snprintf
Changes: https://github.com/COMBINE-lab/libgff/commits/master/

Reported by:    portscout

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)

biology/libgff: GFF/GTF parsing library based on GCLib

This is an attempt to perform a simple "libraryfication" of the GFF/GTF
parsing code that is used in GFFRead codebase. There are not many
(any?) relatively lightweight GTF/GFF parsers exposing a C++ interface,
and the goal of this library is to provide this functionality without
the necessity of drawing in a heavy-weight dependency like SeqAn. Note:
This library draws directly from the code in GFFRead and GCLib, and
exists primarily to remove functionality (and hence code) that is
unnecessary for our downstream purposes. In the future, it may be
appropriate to just replace this library wholesale with GCLib.