support powerdns ABI v.4 (#1386)
produce TLSA RRs
wip move 'synthetic' parsing into NmcDom
add synthetic TLSA (no handling yet)
use Data.Default.Class for empty NmcDom
use current time to synthesize zone version in the SOA record
make default SOA generation = 0
implement working AXFR
fix error reporting
better error reporting
wip AXFR: refactor output funcs
accept request type in command-line args; handle wrong request type propoerly
fix SOA and style cleanup
refactor pdnsOut
wip AXFR support
support some more RRs
reimplement SRV handling
fix for cleanup pdns response generator
cleanup pdns response generator
SRV hack part 3 and final - works now