Changes:
Fix potential segfault in zone transfer corner case.
NSD 3 is end of life and support stops on May 20th, 2016.
BUG FIXES:
- Define _DEFAULT_SOURCE with _BSD_SOURCE for glibc 2.20 on Linux.
(Same as NSD 4.1.8).
- Fix#736: segfault during zone transfer. (Same as NSD 4.1.8).
PR: 207952
Submitted by: jaap@NLnetLabs.nl (maintainer)
MFH: 2016Q1
668c7dceb4