Unbreak and otherwise improve this port:
* Use standard source of PECL-sources -- the old MASTER_SITE is
gone, and good riddance too, because the difference between
0.4 and 0.4.1 was an irrelevant one-liner.
* Patch to use modern PHP ZEND API
* Patch to actually use cracklib as advertized -- since the
port's inception it LIB_DEPENDed on security/cracklib and
advertized its use in pkg-descr, lying on both accounts.
* Throw in a couple of basic usage tests rejecting bad passwords
and accepting good ones.
Special thanks to Nathan Neulinger for making the necessary cracklib function
accessible and to cy@ for promptly updating security/cracklib to use
Nathan's latest release.