[net processing] Comment all TxRelay members

This fully comments all the TxRelay members. The only significant change
is to the comment for m_relay_txs. Previously the comment stated that
one of the purposes of the field was that "We don't relay tx invs before
receiving the peer's version message". However, even without the
m_relay_txs flag, we would not send transactions to the peer before
receiving the `version` message, since SendMessages() returns
immediately if fSuccessfullyConnected is not set to true, which only
happens once a `version` and `verack` message have been received.

0 files changed, 0 insertions, 0 deletions