add TSIG to ext-bind tests
make test-start-stop TSIG algorithm and key configurable
detect duplicate cnames with pdnssec check-all-zones (Issue #545)
pdnssec check-all-zones now detect RRSIG records in non-presigned zones
check for duplicate records with pdnssec check-all-zones (Issue #607)
pdnssec check-all-zones now detect ttl differnce within a rrset
make pdnssec check-all-zones case independent (Issue #684)
Merge pull request #1008 from mind04/tests

tests and pdnssec