Add anyhow and configurable TcpListener

- add anyhow to Cargo.toml
- make the connection parameter (for the TcpListener) configurable

src/daemon/mod.rs

@@ -4,6 +4,7 @@
 // the actual daemon
 //
 
+use anyhow;
 use bytes::Bytes;
 use std::ffi::CString;
 use tokio::signal;
@@ -24,14 +25,15 @@ use indymilter::{
 };
 
 use crate::types::husk_context::HuskContext;
+use crate::config::HuskConfig;
 
 pub struct Daemon { }
 
 impl Daemon {
 
-    pub async fn run() -> Result<(), ()> {
+    pub async fn run(config: &HuskConfig) -> anyhow::Result<()> {
 
-        let listener = TcpListener::bind("localhost:3000")
+        let listener = TcpListener::bind(&config.connection)
             .await
             .expect(" opening milter socket");