Terminate pdns process after SIGINT
Align with pipebackend as per #1137 and #661
Implementation for multi-ip master
SQL statements required by multi-ip master
Remove unnecessary if block
Add comments
Merge pull request #1160 from cmouse/remotebackend-pipe-connector-1137

Align with pipebackend as per #1137 and #661
Check that the domain isn't already served by the new master
Sets d_server to NULL on failed initialization
Merge pull request #1161 from cmouse/gsql-supermaster-dualstack

WIP: Gsql supermaster dualstack
Enable zeromq for remotebackend
Fix typo in TEST_ENVIRONMENT to allow zeromq test suite to run
Merge pull request #1162 from cmouse/nullify-webserver-d_server

Sets d_server to NULL on failed initialization
Add primary key to schemas
Fixed goracle schema white space
Wait until processes die before exiting
libzmq3 compability fixes
Update documention
Merge pull request #1163 from cmouse/gsql-add-primary-key

Add primary key to schemas
Merge pull request #1124 from cmouse/remotebackend-0mq-connector

Remotebackend 0mq connector