[HowTo] powerdns and isp-control

[uwe]

Maybe we should use zone2sql from pdns to convert chunks of zones to sql statements, that would be DB for future use with other db backends! the only drawback i can think of that we need to use a patched version that respects the --start-id when used in conjunction with --zone ... this ofcourse does not do the required tests Uwe Driessen suggested, but would make changes done to BIND zones templates apply to PDNS.