Log Message:
security/zoneminder: Update to 1.29.0

This is the last version that supports autoconf, and this update is
only because it's a reasonable benefit/cost tradeoff as an
intermediaate step.  Tested on netbsd-9/earmv7hf-el.

Upstream chanages:
  many bug fixes and improvements
  zoneminder API
  Multiserver
  limted ONVIF support

See more at
https://github.com/ZoneMinder/zoneminder/releases/tag/v1.29.0-rc2 and
before and after.

Note that when updating, one must run zmupdate to modify the db schema.