message: Remove references to requester singleton in RequestManager.cpp
diff: @@ -845,7 +845,7 @@ void CRequestManager::FindNextBlocksToDownload(NodeId nodeid, unsigned int count
  DbgAssert(state != nullptr, return );
  // Make sure pindexBestKnownBlock is up to date, we'll need it.
  - requester.ProcessBlockAvailability(nodeid);
  + ProcessBlockAvailability(nodeid);
  if (state->pindexBestKnownBlock == nullptr ||
  state->pindexBestKnownBlock->nChainWork < chainActive.Tip()->nChainWork)
  @@ -896,7 +896,7 @@ void CRequestManager::FindNextBlocksToDownload(NodeId nodeid, unsigned int count
  // already part of our chain (and therefore don't need it even if pruned).
  for (CBlockIndex *pindex : vToFetch)
  {
  - if (requester.AlreadyAskedFor(pindex->GetBlockHash()))
  + if (AlreadyAskedFor(pindex->GetBlockHash()))
  continue;
  if (!pindex->IsValid(BLOCK_VALID_TREE))
  