Add locals add and remove subcommands

- `locals add` adds a local (unintroduced) certificate for encryption.
- `locals remove` removes/deacivates a local certificate.
- Overall cleanup

src/types/introducer.rs

@@ -42,6 +42,7 @@ impl Introducer {
         }
     }
 
+    /// Has this introducer certified cert?
     pub fn is_introducing(&self, cert: &Cert) -> bool {
 
         let policy = StandardPolicy::new();
@@ -66,6 +67,7 @@ impl Introducer {
         result
     }
 
+    /// Create an introducer.
     pub fn create(context: &HuskContext, cert: &ValidCert, domains: Vec<String>)
         -> Result<()> {
 
@@ -75,9 +77,15 @@ impl Introducer {
             return Err(IntroducerError::UnsuitableCertificate.into());
         }
 
-        crypto::authenticate(context, cert, true, Some(domains))
+        crypto::authenticate(
+            context,
+            cert,
+            crypto::Role::Introducer,
+            true,
+            Some(domains))
     }
 
+    /// Remove an introducer.
     pub fn remove(context: &HuskContext, cert: &ValidCert, _demote: bool)
         -> Result<()> {
 
@@ -87,7 +95,12 @@ impl Introducer {
             return Err(IntroducerError::UnsuitableCertificate.into());
         }
 
-        crypto::authenticate(context, cert, false, None)
+        crypto::authenticate(
+            context,
+            cert,
+            crypto::Role::Introducer,
+            false,
+            None)
     }
 }