* some more cleanups, forgotten with the last update
* optimized unbound syntax ('always_nxdomain' & 'always_transparent')
* optimized oisd download sources (use wilcard variants which are much smaller)
* removed superfluous version information/function

Signed-off-by: Dirk Brenken <dev@brenken.org>
(cherry picked from commit 54f493ed9d)