refactor(message): rename dc_msg to message

src/dc_securejoin.rs

@@ -9,11 +9,11 @@ use crate::context::Context;
 use crate::dc_configure::*;
 use crate::dc_e2ee::*;
 use crate::dc_mimeparser::*;
-use crate::dc_msg::*;
 use crate::dc_token::*;
 use crate::dc_tools::*;
 use crate::key::*;
 use crate::lot::LotState;
+use crate::message::*;
 use crate::param::*;
 use crate::peerstate::*;
 use crate::qr::check_qr;