Bugfix post v0.32

[EnderCrypto]

• [ ] Referenced an issue explaining the need for the change
• [ ] Updated all relevant documentation in docs
• [ ] Updated all code comments where relevant
• [ ] Wrote tests
• [ ] Updated CHANGELOG_PENDING.md
• Fix Issue “Creating 1 block per Tx when create_empty_block flag set to false”
• Fix memory loading error on 32-bit machines
• txindex/kv: Return an error if there's one when the user searches for a tx
• Limit the number of incoming connections
• [mempool: reserve IDs in InitPeer instead of AddPeer] (https://github.com/binance-chain/bnc-tendermint/commit/51d8f3bc45f55563721faa3d672bfe052dce47e6)

[unclezoro]

There is a comment of a commit is cherry-pick commit 274447e2b, please use the origin info.