small changes to rpc command help message strings
[Qt] remove broken OptionsModel::Upgrade()
remove setting methods in wallet/walletdb
doc: add gist link to 'reject' P2P message mention in release notes
Merge pull request #3606

6943cb9 small changes to rpc command help message strings (Philip Kaufmann)
Merge pull request #3638

cdb6c16 remove setting methods in wallet/walletdb (Cozz Lovan)
44eb59e [Qt] remove broken OptionsModel::Upgrade() (Cozz Lovan)