Fix docs for export-etc-hosts-search-suffix

Fixes #1097
remove ancient INSTALL file from gmysqlbackend
remove old TODO file from bindbackend
code cleanup gmysqlbackend
remove updateDNSSECOrderAndAuthAbsolute from bind backend
disarm debug output
remove stamp-h.in file
use QClassEnum for qclass values
pdnssec check-zone, fix DNSKEY checks
Merge pull request #1098 from zeha/fix-1097

Fix docs for export-etc-hosts-search-suffix
Merge pull request #1104 from mind04/pdnssec

pdnssec check-zone, fix DNSKEY checks
move mysql/pgsql/sqlite3 .sql files to backend directories
remove PowerDHCP? files
remove long gone tools from pdns/Makefile.am
Merge pull request #1105 from mind04/movesql

move mysql/pgsql/sqlite3 .sql files to backend directories
Merge pull request #1106 from mind04/cleanup

Cleanup
Load AXFR-SOURCE when provided for domains
Fixed few nits
Enclosed lua check with set +e
Fixed indentation