Copyright (c) 2018, Bar Ilan Cryptography Research Group, NEC Security Research Labs. All rights reserved. See License.txt
The extension is actually a bridge to the MPCHonestMajorityForSPDZ implementation of the protocol. This implementation also adds Mersenne127 primes to the original implementation, and some additional chanegs to better support the interface to SPDZ
See also SPDZ-2 With Extensions