SERVER-12625: skip oplog entries for no-op fields
SERVER-12382 Windows hosts do not honor --maxConns values > 20,000
SERVER-12304 Query concurrency -- 2.6 regression
SERVER-7937 Additional ReplicaSetMonitor Tests

Signed-off-by: Matt Kangas <matt.kangas@mongodb.com>
SERVER-12682 Add warning on OS X if libc++ is selected and osx-version-min is < 10.7.

Signed-off-by: Andrew Morrow <acm@10gen.com>