Steps towards encryption

- Added certstore and retrieval of the local trust root.
- Major work on keeping the context between calls to the milter.
- Added a context for an email in processing
- Added Husk specific errors

src/config.rs

@@ -3,11 +3,13 @@
 //
 
 use std::fs;
+use std::sync::{Arc, Mutex};
 use serde_derive::Deserialize;
 
-#[derive(Deserialize, Debug)]
+#[derive(Deserialize, Debug, Clone)]
 pub struct HuskConfig {
     pub connection: String,
+    pub sequoia_home: String,
     logfile_config: Option<String>,
 }
 
@@ -41,3 +43,13 @@ impl HuskConfig {
         }
     }
 }
+
+pub type HuskConfigContainer = Arc<Mutex<HuskConfig>>;
+
+impl From<HuskConfigContainer> for HuskConfig {
+    fn from(container: HuskConfigContainer) -> Self {
+        let config = container.lock().unwrap();
+        config.clone()
+    }
+}
+