Log Message:
Upgrade PHP PECL alternative PHP cache extension (apc) to version 3.0.19
to fix arbitrary code execution problems (CVE-2008-1488).

Changes since 3.0.16:
 * Fix for CVE-2008-1488.
 * Fix apc_add() cache expunge bug.
 * Added parameter to apc_fetch to determine success/failure when fetching
   booleans.
 * Fix for bug 13504.
 * Move expunge callback groundwork to 3.1 (Rasmus)
 * Fix fd-leak.
 * Fix double-free on builtin functions.
 * Initial PHP 5.3 support.