fix NSEC for asterisk ents and add test
 fix ringbuffer size decrease
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)
fix NSEC wildcard denial
fix NSEC3s for DS no data (mode 1)
pdnssec check-zone, warn if parsed and original content are not equal
pdnssec check-zone, check for missing NS at apex and records in unlikely places
pdnssec check-zone, improve SOA content check
pdnssec check-zone, improve duplicate checks
pdnssec check-zone, fix record counting and improve out of zone check
pdnssec check-zone, more tolerant IPv6 format check
pdnssec check-zone, fix DNSKEY checks
fix for "missing" libmysqlclient on RHEL/CentOS based systems
add unbound-host to travis builds