Add ability to encrypt sstables (CASSANDRA-9633)

Catch non-IOException in FileUtils.close to make sure that all resources are closed (CASSANDRA-15225)

Nodetool import row cache invalidation races with adding SSTables to tracker (CASSANDRA-14529)

Let nodetool import take a list of directories (CASSANDRA-14442)

Nodetool import cleanup and improvements (CASSANDRA-14417)

Add ability to load new SSTables from a separate directory (CASSANDRA-6719)

Add a few options to nodetool verify (CASSANDRA-14201)

Make all DDL statements idempotent and not dependent on global state (CASSANDRA-13426)

BloomFilter serialization format should not change byte ordering (CASSANDRA-9067)

Remove unused on-heap BloomFilter implementation (CASSANDRA-14152)

Add a virtual table to expose settings (CASSANDRA-14573)

Add a virtual table to expose caches (CASSANDRA-14538)

Expose buffer cache metrics in caches virtual table. (CASSANDRA-14626)

Fix up chunk cache handling of metrics (CASSANDRA-14628)

Add a virtual table to expose active client connections (CASSANDRA-14458)

Clean up and refactor client metrics (CASSANDRA-14524)

NodeTool clientstats should show SSL Cipher (CASSANDRA-14322)

Add ability to specify driver name and version (CASSANDRA-14275)

Add nodetool clientlist (CASSANDRA-13665)

Bind to correct local address in 4.0 streaming (CASSANDRA-14362)

Set broadcast address in internode messaging handshake (CASSANDRA-14579)

Internode messaging handshake sends wrong messaging version number (CASSANDRA-14540)

Use Netty for streaming (CASSANDRA-12229)

Use Netty for internode messaging (CASSANDRA-8457)

Correct and clarify SSLFactory.getSslContext method and call sites (CASSANDRA-14314)

Remove read_repair_chance/dc_local_read_repair_chance (CASSANDRA-13910)

Properly close StreamCompressionInputStream to release any ByteBuf (CASSANDRA-13906)

Correctly close Netty channels when a stream session ends (CASSANDRA-13905)

Fix buffer length comparison when decompressing in Netty-based streaming (CASSANDRA-13899)

Race condition when closing stream sessions (CASSANDRA-13852)

dtest failure: snapshot_test.py:TestSnapshot.test_basic_snapshot_and_restore (CASSANDRA-13836)

Make monotonic read / read repair configurable (CASSANDRA-14635)

Improve read repair blocking behavior (CASSANDRA-10726)

Add coordinator write metric per CF (CASSANDRA-14232)

Make PartitionUpdate and Mutation immutable (CASSANDRA-13867)

Disable old native protocol versions on demand (CASSANDRA-14659)

Refactor CompactionStrategyManager (CASSANDRA-14621)

Extend IAuthenticator to accept peer SSL certificates (CASSANDRA-14652)

For LCS, single SSTable up-level is handled inefficiently (CASSANDRA-12526)

Fix setting min/max compaction threshold with LCS (CASSANDRA-14388)