BF-615: Reduce memory usage on 32-bit systems even more
SERVER-15580 KeepMutationsStage shouldn't deref invalidated iterator
CollectionInfoCache::reset should reset index keys under X lock
Revert "SERVER-15831 top chunk auto split tests"

This reverts commit ce6a6a4f55c29286860ac1993d5929da0205ff8c.
SERVER-14425: handle deadlocks in the middle up a multi-update
SERVER-15623 Test that w:0 is prohibited in getLastErrorDefaults.

Closes #847

Signed-off-by: Benety Goh <benety@mongodb.com>
SERVER-15868 SERVER-15655 Better handling of receiving an invalid config via a heartbeat
SERVER-15868 SERVER-15665 Add required arg to _getHbmsg
SERVER-15898 yielding impl checks for interrupt even if doc-level locking is supported
SERVER-15896 Rename variable to avoid coverity warning from hiding function parameter
SERVER-13951 pass false to invalidateAll() when dropping collection

true should only be passed from the CollectionCursorCache destructor.
SERVER-15907 Use ftuncate rather than fallocate on linux tmpfs

This means we don't use any ram for unused portions of files.
SERVER-15684 Make copydb work with SCRAM (SASL)
SERVER-15890 Fix initial sync from 2.6 node by setting slaveOk bit where necessary
SERVER-15598 Use dynamic dependencies for enterprise .debs
Remove mongo-tools now built in go from .gitignore
SERVER-15900: secondaries should stripe writes by doc if doc locking is on
SERVER-13635: add isDurable to StorageEngine and use for GLE
SERVER-15819: fix privilege check on currentOpCtx
SERVER-15870 Prune command stats for commands that haven't run

Signed-off-by: Dan Pasette <dan@mongodb.com>