refs #661
SERVER-7498 Make sync targets const

Conflicts:
	src/mongo/db/repl/bgsync.h
	src/mongo/db/repl/rs_initialsync.cpp
	src/mongo/db/repl/rs_sync.cpp
refs #663, disable tests that do not apply to TokuMX replication. We do not have a minvalid value
refs #660, make an alternate fix to SERVER-9283
attempt
Revert "attempt"

This reverts commit ab8d7ea63b6a1e987efdc397de2eb213cf20cd8e.
refs #645, add information on status of purge Oplog thread to
rs.status(). New fields nextPurgedGTID and nextPurgedTS added
refs #658, change default of expireOplogDays to 14
refs #645, add loops_run during a hot optimize of the oplog and log at level 2
Merge commit '2b6e7950705bd7eb76210ab1c5879095641f521a' into bugfixes/tokumx-1.3
Merge branch 'bugfixes/tokumx-1.3'