Phase1 doesn't take into account list of signers

[survived]

At phase1, signer tries to send p2p messages to every party holding a share regardless whether this party appear in list of signers. In other words, at phase1 party sends n messages, but should send t+1 messages.

Here's the code that causes this behaviour:

1. Phase1::start generates list of messages. Messages are sent to every party listed in the map in phase1.mta_a
2. The map is constructed in Phase1::new, note that every party from keygen is included, regardless whether this party appears in signers list

Suggested solution: filter out parties that are not listed in signers list from the map in Phase1::start

[igmar]

ING has no intention of resolving this, nor on maintaining this further, and hence, this repo will be archived. Its usage is no longer recommended, see the updated README.