Allow compaction of system tables during startup
patch by Benedict Elliott Smith; reviewed by jbellis for CASSANDRA-6913
Revert "Don't shut ExpiringMap down."

This reverts commit d4ec31f21eb83502bd523c057bce2d3b249b3d80.

Conflicts:
	CHANGES.txt
Handle short slice start/finishes of different lengths

Patch by Tyler Hobbs; reviewed by Sylvain Lebresne as a follow-up for
CASSANDRA-6825
Skip range calculations for range slices on LocalStrategy keyspaces

Patch by Tyler Hobbs; reviewed by Jonathan Ellis for CASSANDRA-6906
Add logging about not autobootstrapping a seed.

Patch by brandonwilliams for CASSANDRA-6972
Merge branch 'cassandra-1.2' into cassandra-2.0

Conflicts:
	src/java/org/apache/cassandra/service/StorageService.java
Fix LatencyMetrics returning infinity.

Patch by Nick Bailey, reviewed by Lyuben Todorov for CASSANDRA-6920
Merge branch 'cassandra-1.2' into cassandra-2.0
Fix LatencyMetrics returning infinity.

Patch by Nick Bailey, reviewed by Lyuben Todorov for CASSANDRA-6920
Add forgotten test
Merge branch 'cassandra-1.2' into cassandra-2.0
Add forgotten test
Continue with assassinate even if the endpoint vanishes during the
sleep-for-safety check.

Patch by brandonwilliams, reviewed by Jeremiah Jordan for CASSANDRA-6787
Merge branch 'cassandra-1.2' into cassandra-2.0
Fix SSTable not released if stream session fails

patch by yukim; reviewed by Richard Low for CASSANDRA-6818
if relocate is a no-op, don't try to op.
Merge branch 'cassandra-1.2' into cassandra-2.0
Revert "Fix LatencyMetrics returning infinity."

This reverts commit 5e51aa4e6d1d868bb82a1aa2ffaed4613b24ffc1.
getRecentLatency returns zero instead of infinity

Patch by Benedict, reviewed by brandonwilliams for CASSANDRA-6920