Netriplex Patches

Conflicts:
	src/knot/main.c

Increase the expire time for zones with very short expiry. Without
this a zone may expire if there is a timeout, and once it has expired
it won't be served until it is refreshed. Sometimes, customers load
zones with SOA values that we have little control over.

Signed-off-by: Jan Kadlec <jan.kadlec@nic.cz>

Fix for a problem falling back to AXFR from IXFR when a single SOA
is processed only.

Signed-off-by: Jan Kadlec <jan.kadlec@nic.cz>

Allow the working directory to be set optionally with
knotd's -d option. The main purpose is to allow core dumps to go
somewhere other than '/'.

Signed-off-by: Jan Kadlec <jan.kadlec@nic.cz>