Hint the _id index instead of using $snapshot query option

diff --git a/src/mongo/gotools/common/db/command.go b/src/mongo/gotools/common/db/command.go

index f777d94..159bdfb 100644

--- a/src/mongo/gotools/common/db/command.go

+++ b/src/mongo/gotools/common/db/command.go

@@ -204,7 +204,9 @@ func (sp *SessionProvider) FindOne(db, collection string, skip int, query interf

 // ApplyFlags applies flags to the given query session.

 func ApplyFlags(q *mgo.Query, session *mgo.Session, flags int) *mgo.Query {

 	if flags&Snapshot > 0 {

-		q = q.Snapshot()

+		// The snapshot option for find has been removed in the server, workaround by hinting the 

+		// _id index instead.

+		q = q.Hint("_id")

 	}

 	if flags&LogReplay > 0 {

 		q = q.LogReplay()

diff --git a/src/mongo/gotools/mongodump/mongodump.go b/src/mongo/gotools/mongodump/mongodump.go

index 41b37e3..e05b83e 100644

--- a/src/mongo/gotools/mongodump/mongodump.go

+++ b/src/mongo/gotools/mongodump/mongodump.go

@@ -544,7 +544,7 @@ func (dump *MongoDump) DumpIntent(intent *intents.Intent, buffer resettableOutpu

 		// ---forceTablesScan runs the query without snapshot enabled

 		findQuery = session.DB(intent.DB).C(intent.C).Find(nil)

 	default:

-		findQuery = session.DB(intent.DB).C(intent.C).Find(nil).Snapshot()

+		findQuery = session.DB(intent.DB).C(intent.C).Find(nil).Hint("_id")

 	}

 	var dumpCount int64

-- 

2.7.4