* tx-pool: accept local tx with higher gas price when pool full * Revert "tx-pool: accept local tx with higher gas price when pool full" This reverts commit 9d4adc5a * tx-pool: new tx with same nonce as existing is ready * tx-pool: explicit check for replacement tx (same sender & nonce) * Update comment Co-Authored-By: Tomasz Drwięga <tomusdrw@users.noreply.github.com> * Replace `ReplaceOld` with `InsertNew` for replacement txs