4401. [misc] Change LICENSE to MPL 2.0.
update copyright notice
1851. [doc] Doxygen comment markup. [RT #11398]
1516. [func] Roll the DNSSEC types to RRSIG, NSEC and DNSKEY.
#include <config.h>
copyright update
Move dns_dnssec_iszonekey to dns_zonekey_iszonekey, to make the rbtdb not require all of dst to be linked in.