message: Remove last instance fo BITCOIN_CASH from unlimited.h
  Slightly reword comments around SINGLE_PEER_REQUEST_MODE_AGE enum value
  and add a TODO point about the set value itself.
diff: @@ -40,13 +40,10 @@ enum
  MAX_HEADER_REQS_DURING_IBD = 3,
  // if the blockchain is this far (in seconds) behind the current time, only request headers from a single
  -// peer. This makes IBD more efficient. We make BITCOIN_CASH more lenient here because mining could be
  -// more erratic and this node is likely to connect to non-BCH nodes.
  -#ifdef BITCOIN_CASH
  + // peer. This makes IBD more efficient.
  + // TODO: since the new DAA cash mining is no more erratic than bitcoin legacy.
  + // Wouldn't been better to set it back to what it was? (i.e. 24 * 60 * 60)
  SINGLE_PEER_REQUEST_MODE_AGE = (7 * 24 * 60 * 60),
  -#else
  - SINGLE_PEER_REQUEST_MODE_AGE = (24 * 60 * 60),
  -#endif
  };
  class CBlock;
  