These two files pecl-apc-3.0.16-apc_set_signals.patch pecl-apc-3.0.16-CVE-2008-1488.patch in dev-php/pecl-apc/files seem to belong to old versions of pecl-apc, are not used by any of the ebuilds in the tree and can probably be deleted. Or do they have any purpos.
No need for these patches. Removed from CVS