SERVER-13496 do not abort replication on secondaries when index name conflicts (via 2.4.9)
SERVER-12084 fix comment in RecordStoreV1Base::validate
SERVER-13494 Use numeric sorting for versions in the multi-version script

Signed-off-by: Matt Kangas <matt.kangas@mongodb.com>
MCI-13287: delegate to shell when compressing tar archives

Signed-off-by: Matt Kangas <matt.kangas@mongodb.com>
SERVER-13611 fix sort elimination in the case of trailing fields