Remove expired PHP5.5 ports.

Don't use extension.ini any more, and have each extension install in its
file, so the order remains the same.

Every PHP (or Zend) extension now installs its own .ini file in
/usr/local/etc/php.  A PHP extension will be automatically activated
when installed.  The order into which extensions are loaded is
automatically guessed.  In some very rare cases, the guess will be
wrong, and PHP_MOD_PRIO will need to be set.  Refer to the USES=php
section of the Porter's Handbook for more information.

Convert ports touching etc/php/extensions.ini manually, or telling the
OP to do it.

And finally, bump PORTREVISION for all php extensions.

PR:		210697
Submitted by:	mat
Sponsored by:	Absolight
Differential Revision:	https://reviews.freebsd.org/D7022

Update PHP ports:

- php5 to 5.4.42
- php55 to 5.5.26
- php56 to 5.6.10

Bump more ports that depend on libsqlite3.so:
- ports that set USE_SQLITE with the *_USE option helper
- ports that depend on libsqlite3 indirectly as reported by pkg rquery

Approved by:	portmgr (implicit)

Stagify.

Add NO_STAGE all over the place in preparation for the staging support (cat:
databases)

Welcome PHP 5.5!

Future steps:
- rename current php5 ports to php54
- make php55 the default one after an exp-run