WIP: zoneminder: new package

FIXME 1: add missing (optional) perl modules?
FIXME 2: does it run?

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ZoneMinder is a video camera security and surveillance solution.

http://www.zoneminder.com/

Implementation notes:
ZoneMinder needs the Sys::Mmap Perl module for mmap support, so I added
that. And DBD::mysql didn't build (or tests failed), so I upgraded it to
the latest version, 4.023 (was 4.013).
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