Please note that the BIP144 has just been revised to match the implementation in #7910. We will use the 1<<3 service bit (NODE_WITNESS) to signal the readiness for segwit.

https://github.com/bitcoin/bips/commit/dde47fc973b015c6cc91a0ed28fb3aca57add5e6 <https://github.com/bitcoin/bips/commit/dde47fc973b015c6cc91a0ed28fb3aca57add5e6>