Ret
* Refactor function params from `std::string` to `const std::string&` * Refactor more function params to use const references
* Refactor: CDarkSendSigner -> CMessageSigner + CMasternodeBroadcast::IsVinAssociatedWithPubkey * move IsVinAssociatedWithPubkey to CMasternode * static IsVinAssociatedWithPubkey -> no params IsInputAssociatedWithPubkey