cqlsh should automatically disable tracing when selecting from system_traces

patch by Philip Thompson and Mikhail Stepura; reviewed by Mikhail Stepura for CASSANDRA-7641
Fix NPE in FileCacheService.sizeInBytes

patch by tjake; reviewed by jbellis for (CASSANDRA-7756)
Fix sstableloader unable to connect encrypted node

patch by yukim; reviewed by krummas for CASSANDRA-7585
CQLSH: wait up to 10 sec for a tracing session.

patch by Mikhail Stepura; reviewed by Tyler Hobbs for CASSANDRA-7222
(Hadoop) allow ACFRW to limit nodes to local DC

patch by Robbie Strickland; reviewed by Aleksey Yeschenko for
CASSANDRA-7252
Properly reject operations on list index

patch by slebresne; reviewed by thobbs for CASSANDRA-7499
Fix dropping collection column when it's the last regular column

patch by slebresne; reviewed by iamaleksey for CASSANDRA-7744
partial backport 3569
(cqlsh) enable CTRL-R history search with libedit

patch by Aleksey Yeschenko; reviewed by Jeremiah Jordan for
CASSANDRA-7577
Fix PRSI handling of CQL3 row markers for row cleanup

patch by Berenguer Blasi; reviewed by Aleksey Yeschenko for
CASSANDRA-7787
Throw IRE for relations on entire collections

Patch by Tyler Hobbs; review by Sylvain Lebresne for CASSANDRA-7506
Improve PasswordAuthenticator default super user setup

patch by Aleksey Yeschenko; reviewed by Jeremiah Jordan for
CASSANDRA-7788
Merge branch 'cassandra-1.2' into cassandra-2.0

Conflicts:
	CHANGES.txt
Validate empty cell names from counter updates

patch by Aleksey Yeschenko; reviewed by Jeremiah Jordan for
CASSANDRA-7798
Merge branch 'cassandra-1.2' into cassandra-2.0

Conflicts:
	CHANGES.txt
	src/java/org/apache/cassandra/cql3/Constants.java
Throw EOFException if we run out of chunks in compressed file

Patch by marcuse; reviewed by yukim for CASSANDRA-7664.
Stop inheriting liveRatio and liveRatioComputedAt from previous memtables

patch by Aleksey Yeschenko; reviewed by Jonathan Ellis for CASSANDRA-7796
Make StreamReceiveTask thread safe and gc friendly

patch by yukim; reviewed by benedict for CASSANDRA-7795
Fix ReversedType.isCompatibleWith()

Patch by Tyler Hobbs; reviewed by Sylvain Lebresne for CASSANDRA-7797
Configure system.paxos with LeveledCompactionStrategy
patch by Sankalp Kohli; reviewed by jbellis for CASSANDRA-7753