Log Message:
net/powerdns*: Update to 4.1.2.

Improvements
- API: increase serial after dnssec related updates
- Dnsreplay: bail out on a too small outgoing buffer
- lower ‘packet too short’ loglevel
- Make check-zone error on rows that have content but shouldn’t
- avoid an isane amount of new backend connections during an axfr
- Report unparseable data in stoul invalid_argument exception
- recheck serial when axfr is done
- add tcp support for alias

Bug Fixes
- allocate new statements after reconnecting to postgresql
- bindbackend: only compare ips in ismaster() (Kees Monshouwer)
- Rather than crash, sheepishly report no file/linenum
- Document undocumented config vars
- prevent cname + other data with dnsupdate