devel/rttr: Don't extract unused files

Convert the post-extract target to EXTRACT_AFTER_ARGS to save on I/O.

Pet portclippy(1).

PR:		278750

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/rttr: fix build, missing USES

devel/rttr: Fix build on 14- / modern Clang

- the bundled rapidjson doesn't build on 14- because of changes
  in the STL; use the version from ports instead which has the
  changes needed already.
- the chaiscript examples don't build with modern Clang on 14-,
  and the examples are explicitly C++14 -- but still don't work

Replace the bundled rapidjson and chaiscripts with the
regular ports versions. There has been some work in git
on both rttr and chaiscript, but neither has a newer
release that might be pulled in, so we'll stick to messy
patching of rttr instead.

devel/rttr: fix portscout lookup

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

Remove # $FreeBSD$ from Makefiles.

devel/rttr: unbreak on CURRENT

- add commit from upstream pr:
	https://github.com/rttrorg/rttr/pull/261

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

Fix devel/rttr on GCC-based architectures.

 - Use C++11-capable compiler
 - Import fix from upstream's upstream,
	https://github.com/Tencent/rapidjson/commit/fa5963a2f5b231ee2babff771f169ccca22870ed

No PORTREVISION bump since it didn't compile before, and the
patch doesn't change any functionality.

PR:		237697
Submitted by:	pkubaj
Reported by:	pkubaj

New port: devel/rttr -- Run Time Type Reflection

RTTR stands for Run Time Type Reflection. It describes the ability of a
computer program to introspect and modify an object at runtime. It is also the
name of the library itself, which is written in C++ and released as open source
library.

The goal of this project is to provide an easy and intuitive way to use
reflection in C++.

This will be used by an upcoming multimedia/kdenlive release.