Log Message:
Bring APC to 3.0.16. This fixes a number of issues:

3.0.16
* Fix for longstanding cache-full crash (Christian Seiler)
	http://news.php.net/php.pecl.dev/4951 for the details
* Added optional shm unmap on a fatal signal feature (Lucas Nealan)
* Added PTHREAD_MUTEX_ADAPTIVE_NP option pthread locks (Paul Saab)
* Minor cleanups (Lucas Nealan)
* Added configure option to enable apc_cache_info('filehits') (Shire)

3.0.15
* Eliminate a per-request time() syscall (Rasmus)
* Added rfc1867 prefix, name, and freq ini options (Shire)
* Allow deletion of individual user cache entries via apc.php (Sara)
* Fix overzealous cleanup during RSHUTDOWN (Gopal)
* Fix memory alignment and locking issues (Gopal)
* Make apc_compile insert/replace entries (Shire)
* Make mixed inheritance recompile & cache afresh (Gopal)
* Make nostat mode search include_path for canonicalization (Gopal)
* ZTS & other compile fixes (Gopal, Edin, Shire)