math: remove 'Created by' lines

A big Thank You to the original contributors of these ports:

  *  Aaron Dalton <aaron@FreeBSD.org>
  *  Aaron Dalton <aaron@daltons.ca>
  *  Alessando Sagratini <ale_sagra@hotmail.com>
  *  Alex Dupre <ale@FreeBSD.org>
  *  Alexey Dokuchaev <danfe@FreeBSD.org>
  *  Amarendra Godbole <amarendra.godbole@gmail.com>
  *  Anders Nordby <anders@FreeBSD.org>
  *  Andreas Fehlner (fehlner@gmx.de)
  *  Andrew L. Neporada <andrew@chg.ru>
  *  Andrey <gugu@zoo.rambler.ru>
  *  Andrey Zakhvatov

INSTALLS_ICONS: retire the macro and rework the related dependencies

While here, make sure gtk-update-icon-cache is only on run dependency
where added as a dependency
Enforce gtk3 to depend on gtk-update-icon-cache (previously it was
inheriting the dependency)

Remove # $FreeBSD$ from Makefiles.

Welcome XFCE 4.16 to the FreeBSD ports tree!

Upstream announce: https://xfce.org/about/news/?post=1608595200

This XFCE release dropped support for GTK2 plugins and also dropped
GTK2 from all components.

WARNING: please check UPDATING before upgrading your packages. In
case of problems also read the libexo pkg-message.

Due to this some panel plugins and libraries will be removed since
they cannot compile anymore:

- print/xfce4-print
- x11/xfce4-quicklauncher-plugin

Update xfce4-calculator-plugin to 0.7.1

math/xfce4-calculator-plugin: fix build on GCC architectures

Use C11 compiler:
In file included from /usr/local/include/xfce4/libxfce4util/libxfce4util.h:33,
                 from calculator.c:29:
/usr/local/include/xfce4/libxfce4util/xfce-kiosk.h:37: error: redefinition of
typedef 'XfceKiosk'
/usr/local/include/xfce4/libxfce4util/xfce-kiosk.h:35: error: previous
declaration of 'XfceKiosk' was heremv -f .deps/libcalculator_la-lexer.Tpo
.deps/libcalculator_la-lexer.Plo

Approved by:	mentors (implicit approval)

Welcome XFCE 4.14 to the FreeBSD ports tree

- This XFCE release uses almost exclusively gtk3, so the USES=xfce
  now defaults to gtk3
- Make x11-themes/gtk-xfce-engine an optional dependency(disabled
  by default), it only supports gtk2, so would leave miost of this
  XFCE version unthemed.
- Add Greybird as an optional and enabled dependency as a modern
  theme supporting both GTK versions and all other XFCE parts
- The xfce4-vala port is deprecated and removed. The VALA bindings
  are available in the library ports using the GIR and VAPI options
  (on by default)
- Fixed various missing library and portlint warnings (portmgr fixit
  blanket)
- Default Display Manager changed to lightdm (Thanks to woodsb02

- Simplify XFCE MASTER_SITES usage
- Update XFCE Master sites list

Submitted by:		olivierd
Reviewed by:		mat
Approved by:		portmgr (mat)
Differential Revision:	https://reviews.freebsd.org/D8416

- Update to 0.7.0
- Adjust dependencies
- Add NLS option

PR:		236007
Submitted by:	Olivier Duchateau <duchateau.olivier@gmail.com>

Clenup xfce ports:

- Add missing dependencies
- Remove unneeded patches
- Regenerate and rename legacy patches
- Add NLS option to ports providing such a knob, and missing the
  option
- Add INSTALL_TARGET=install-strip where missing
- Sort things
- Remove unneeded +=
- Cosmetic changes to OPTION related variables to improve readability
- Update WWW
- Silence portlint warnings about variables order
- Bump PORTREVISION where changing dependencies and/or adding
  install-strip

Update to 0.6.0

Update to 0.5.2

It is a calculator plugin for the Xfce4 panel. The plugin supports common
mathematical operators, constants (pi) and functions.

WWW: http://goodies.xfce.org/projects/panel-plugins/xfce4-calculator-plugin

Obtained from:	Xfce devel repository