chore, define an use a conditional on leapsecond aware zone files

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
chore, zap to latest clitoris version

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'bld/netbsd' into next

* bld/netbsd:
  chore, zap to latest clitoris version
  chore, define an use a conditional on leapsecond aware zone files