message: Don't disconnect peers on MNAUTH verification failure
  * Don't disconnect peers on MNAUTH verification failure
  Only give them a DoS score.
  * Re-add cs_main lock
diff: @@ -75,9 +75,10 @@ void CMNAuth::ProcessMessage(CNode* pnode, const std::string& strCommand, CDataS
  auto dmn = mnList.GetValidMN(mnauth.proRegTxHash);
  if (!dmn) {
  LOCK(cs_main);
  + // in case he was unlucky and not up to date, just let him be connected as a regular node, which gives him
  + // a chance to get up-to-date and thus realize by himself that he's not a MN anymore. We still give him a
  + // low DoS score.
  Misbehaving(pnode->id, 10);
  - // in case he was unlucky and not up to date, let him retry the whole verification process
  - pnode->fDisconnect = true;
  return;
  }
  @@ -90,9 +91,9 @@ void CMNAuth::ProcessMessage(CNode* pnode, const std::string& strCommand, CDataS
  if (!mnauth.sig.VerifyInsecure(dmn->pdmnState->pubKeyOperator, signHash)) {
  LOCK(cs_main);
  + // Same as above, MN seems to not know about his fate yet, so give him a chance to update. If this is a
  + // malicious actor (DoSing us), we'll ban him soon.
  Misbehaving(pnode->id, 10);
  - // in case he was unlucky and not up to date, let him retry the whole verification process
  - pnode->fDisconnect = true;
  return;
  }
  