PJPROJECT 2.5.5 introduced a race condition with the -r5349 IPv6 DNS
patch.
The patch below fixes a write to freed memory under cartain DNS lookup
conditions.
0006-r5477-svn-backport-Fix-DNS-write-on-freed-memory.patch
ASTERISK-26516
Reported by: Richard Mudgett
Change-Id: Ifdfae9ecf1e41b53080f33aab44ce1a220f349c5