- Backport multiline txt records support 
- Bump PORTREVISION
powerdns-recursor 3.1.4 doesn't support multiline txt records, which
are used by various dns information systems. 3.1.5 does have support
for this. A backport of the code changes is relatively risk-free, and has been
requested by users and port maintainers.
Submitted by: Sten Spans <firstname.lastname@example.org> (Maintainer)