Remove PHP 7.1 ports, upstream security support ended on 2019-12-01 :

2019-12-01 archivers/php71-bz2
2019-12-01 archivers/php71-phar
2019-12-01 archivers/php71-zip
2019-12-01 archivers/php71-zlib
2019-12-01 converters/php71-iconv
2019-12-01 converters/php71-mbstring
2019-12-01 converters/php71-recode
2019-12-01 databases/php71-dba
2019-12-01 databases/php71-interbase
2019-12-01 databases/php71-mysqli
2019-12-01 databases/php71-odbc
2019-12-01 databases/php71-pdo
2019-12-01 databases/php71-pdo_dblib

Update to 7.1.21

Changelog: http://www.php.net/ChangeLog-7.php#7.1.21

Approved by:	tz (implicit)
MFH:		2018Q3

graphics/php7*-gd: fix broken build when XPM option is disabled

The switch from bundled gd to graphics/gd broke the port
if a user disabled the XPM option.

PR:		230234 217222
Submitted by:	Guido Falsi <madpilot@FreeBSD.org>
Reported by:	Guido Falsi <madpilot@FreeBSD.org>,  Dani <i.dani@outlook.com>

graphics/php71-gd: Switch from bundled libgd to graphics/gd

Currently the gd-module uses a bundled libgd, while most systems
already provide the same library via graphics/gd.
Therefore instead of adding the bundled library we use the
port instead.

PR:		217222
Submitted by:	Mikhail Teterin  <mi@FreeBSD.org>

PHP 7.1 and PHP 7.2: add TEST_TARGET to all extensions

This enables "make test" in every extension and eases
the test of changes to PHP.

I did ignore PHP 7.0 intentionally since it only receives
security updates and will EOL at the end of the year. Therefore
no great amount of work is expected for 7.0.

Update PHP 7.1 from 7.1.5 to 7.1.6

Changelog: http://www.php.net/ChangeLog-7.php#7.1.6

MFH: 2017Q2

graphics/php71-gd: remove options T1LIB and VPX, add option WEBP

Support for T1LIB and VPX was removed in PHP 7.0
Support for WebP support was added in PHP 7.0

PR:           219837
Submitted by: Dani <i.dani@outlook.com>

Add PHP 7.1

Thanks to: mat, pi, ale, martin@waschbuesch.de and franco@opnsense.org