SERVER-14135 implement processReplSetFreeze() in LegacyReplicationCoordinator
SERVER-14135 implement processReplSetMaintenance() in LegacyReplicationCoordinator
SERVER-14135 implement processReplSetSyncFrom() in LegacyReplicationCoordinator
SERVER-14135 implement processReplSetUpdatePosition() and processReplSetUpdatePositionHandshake() in LegacyReplicationCoordinator
SERVER-14077 fix binding problem in ReplSetTest.awaitReplication()
SERVER-14361 fix not master problem in initial_sync3.js