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.

devel/R-cran-vctrs: Update to 0.4.1

devel/R-cran-vctrs: Update to 0.4.0

devel/R-cran-vctrs: Update to 0.3.8

devel/R-cran-vctrs: Update to 0.3.7

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

Remove # $FreeBSD$ from Makefiles.

- Update to 0.3.6

- Update to 0.3.5
- Change LICENSE to MIT

- Update to 0.3.4

- Update to 0.3.3

- Update to 0.3.2

- Update to 0.3.1

- Update to 0.3.0

math/R: Update to version 4.0.0

Upstream changes:
https://stat.ethz.ch/pipermail/r-announce/2020/000653.html

Also bump PORTREVISION of ports that depend on math/R.

Submitted by:	wen (in part)
Reviewed by:	jwb, Rainer Hurling <rhurlin@gwdg.de>, thierry
Differential Revision:	https://reviews.freebsd.org/D24572

- Update to 0.2.4

- Update to 0.2.2

- Update to 0.2.1

Bump PORTREVISION for ports depending on the canonical version of GCC
as defined in Mk/bsd.default-versions.mk which has moved from GCC 8.3
to GCC 9.1 under most circumstances now after revision 507371.

This includes ports
 - with USE_GCC=yes or USE_GCC=any,
 - with USES=fortran,
 - using Mk/bsd.octave.mk which in turn features USES=fortran, and
 - with USES=compiler specifying openmp, nestedfct, c11, c++0x, c++11-lang,
   c++11-lib, c++14-lang, c++17-lang, or gcc-c++11-lib
plus, everything INDEX-11 shows with a dependency on lang/gcc9 now.

PR:		238330

- Update to 0.2.0
- Make portlint happy

- Add new port: devel/R-cran-vctrs

  Defines new notions of prototype and size that are used to provide
  tools for consistent and well-founded type-coercion and size-recycling,
  and are in turn connected to ideas of type- and size-stability
  useful for analyzing function interfaces.

  WWW: https://cran.r-project.org/web/packages/vctrs/