Update CONFLICTS definitions in categories a* to c*

Update the CONFLICTS definitions of ports in the following categories:

- accessibility
- archivers
- audio
- benchmarks
- biology
- cad
- chinese
- comms
- converters

An attempt has been made to use generic conflicts patterns that do not
have to be updated whenever a new version of a conflicting port is
added to the ports system.

There is a misunderstanding that the port being built/installed has to
be omitted from the conflicts pattern. This is not true - the port
being built is implicitly non-conflicting due to logic in bsd.port.mk.

Approved by:	portmgr (implicit)

*/asterisk-*: Remove support for expired net/asterisk13

*/*asterisk*: Make asterisk18 the default version

Ports depending on asterisk use flavors to generate packages for
each version.
Make sure the default flavor points to the latest version.

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

Remove # $FreeBSD$ from Makefiles.

- Repocopy asterisk16 to asterisk18 and update to new version 18.0.0
- Add conflicts and flavors for version 18 to asterisk modules I maintain.

audio/asterisk-flite: fix build on GCC architectures

C11 compiler is necessary:

In file included from /usr/local/include/asterisk/vector.h:22,
                 from /usr/local/include/asterisk/stringfields.h:178,
                 from /usr/local/include/asterisk/app.h:26,
                 from app_flite.c:42:
/usr/local/include/asterisk/lock.h: In function 'ast_atomic_fetchadd_int':
/usr/local/include/asterisk/lock.h:752: error: '__ATOMIC_RELAXED' undeclared
(first use in this function)
/usr/local/include/asterisk/lock.h:752: error: (Each undeclared identifier is
reported only once
/usr/local/include/asterisk/lock.h:752: error: for each function it appears in.)
/usr/local/include/asterisk/lock.h: In function 'ast_atomic_dec_and_test':
/usr/local/include/asterisk/lock.h:762: error: '__ATOMIC_RELAXED' undeclared
(first use in this function)

MFH:		2020Q1 (build fix blanket)

Make asterisk16 the default flavor.

Approved by:	portmgr (flavors already approved for these ports)

net/unison*, audio/asterisk-*: Set FLAVOR to a non-empty value by default

Use range modifier properly.  The right syntax for looking up the
first word of a variable is ${FLAVORS:[1]}.

Reviewed by:	madpilot
Differential Revision:	https://reviews.freebsd.org/D22530

Remove non-default support for expired net/asterisk15

Approved by:	portmgr (implicit, FLAVORS change)

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

Bump PORTREVISION for ports depending on the canonical version of GCC
defined via Mk/bsd.default-versions.mk which has moved from GCC 7.4 t
GCC 8.2 under most circumstances.

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, as a double check, everything INDEX-11 showed depending on lang/gcc7.

PR:		231590

- Add asterisk 16.0.0 to ports
- Update g72x module to 1.4.3, which add support for asterisk 16
- Add asterisk16 flavor and conflicts to asterisk modules ports
  which support it
- Add conflicts to other asterisk versions ports
- Add deprecation notice to asterisk15 which will reach EOL on
  2019-10-03
- Fix wording on SOUNDS option description
- Remove old MOVED line for asterisk16 which was for the long removed
  asterisk 1.6 version

Approved by:	portmgr (flavors already approved in the past)

Add flavors to asterisk modules to produce packages for all asterisk
versions present in the ports tree.

Approved by:		portmgr (mat)
Differential Revision:	https://reviews.freebsd.org/D15007

Remove options to compile these ports against net/asterisk11 in
preparation for port expiration.

asterisk 11.x will EOL on 2017-10-25 and is scheduled for removal.

Please use the net/asterisk13 port.

Update to 3.0

Flite For Asterisk provides the "Flite" dialplan application, which
allows you to use the Flite TTS Engine with Asterisk.

WWW: http://zaf.github.io/Asterisk-Flite/