Add setting read and extra check to adding an auto-ptr record
Add setting read and extra check to adding an auto-ptr record

It is using domain sepcific or global auto-ptr setting
to determine the using of auto-ptr creation.
ngoduykhanh/PowerDNS-Admin,ngoduykhanh/PowerDNS-Admin,ngoduykhanh/PowerDNS-Admin,ngoduykhanh/PowerDNS-Admin