I've tagged 3.6 and 3.0.6 tentatively for release. This means all changes to this version are effectively frozen barring a regression in the tagged version.
I've created cassandra-3.7 branch and marked the build version as such. Trunk is now marked 3.8. New JIRA versions for 3.7 and 3.0.7 and 3.8 have been added. The merge order now goes: cassandra-3.0 -> cassandra-3.7 -> trunk