recursive bump from ffmpeg shlib major changes
Bump PKGREVISION from default PHP version change to 5.4.
Update netpgpverify, the standalone PGP signature verification utility, to
latest 20130316 sources.

Changes since previous version:

+ this version is completely standalone, and relies on no external
libraries (other than libc)

+ updated man page to reflect reality

+ minor configure script added
Note security/netpgpverify update to version 20130316