Merge pull request #6905
a6efc01 Bugfix: Omit wallet-related options from -help when wallet is disabled (Luke Dashjr)
5f9260f Bugfix: If genproclimit is omitted to RPC setgenerate, don't change it; also show correct default in getmininginfo (Luke Dashjr)
420a82f Bugfix: Describe dblogsize option correctly (it refers to the wallet database, not memory pool) (Luke Dashjr)
caa3d42 Bugfix: RPC: blockchain: Display correct defaults in help for verifychain method (Luke Dashjr)