MFC r254651:

Update Bind to 9.9.3-P2

Notable new features:

*  Elliptic Curve Digital Signature Algorithm keys and signatures in
   DNSSEC are now supported per RFC 6605. [RT #21918]

*  Introduces a new tool "dnssec-verify" that validates a signed zone,
   checking for the correctness of signatures and NSEC/NSEC3 chains.
   [RT #23673]

*  BIND now recognizes the TLSA resource record type, created to
   support IETF DANE (DNS-based Authentication of Named Entities)
   [RT #28989]

*  The new "inline-signing" option, in combination with the
   "auto-dnssec" option that was introduced in BIND 9.7, allows
   named to sign zones completely transparently.

Approved by:	delphij (mentor)
Sponsored by:	DK Hostmaster A/S