mongocryptd returns upsert/multi as false

repro.js

/*
 * start mongocryptd, then do:
 * mongo --port 27017 repro.js
 */
var schema = {
  properties: {
    ssn: {
      encrypt: {
        keyId: [
            BinData(4, "AAAAAAAAAAAAAAAAAAAAAA==")
        ],
        bsonType: "string",
        algorithm: "AEAD_AES_256_CBC_HMAC_SHA_512-Deterministic",
        initializationVector: BinData(0, "aWlpaWlpaWlpaWlpaWlpaQ==")
      }
    }
  },
  bsonType: "object"
};

var cmd = {
    update: "coll",
    updates: [{ q: {}, u: { ssn: "123" }, upsert: true,  multi: true }],
    jsonSchema: schema
};

printjson(db.runCommand(cmd))
/* Prints:
{
	"hasEncryptionPlaceholders" : true,
	"schemaRequiresEncryption" : true,
	"result" : {
		"update" : "coll",
		"updates" : [
			{
				"q" : {

				},
				"u" : {
					"ssn" : BinData(6,"AEkAAAAQYQABAAAABWl2ABAAAAAAaWlpaWlpaWlpaWlpaWlpaQVraQAQAAAABAAAAAAAAAAAAAAAAAAAAAACdgAEAAAAMTIzAAA=")
				},
				"multi" : false,
				"upsert" : false
			}
		],
		"$db" : "test"
	},
	"ok" : 1
}
*/