#![deny(missing_docs)] and lots of documentation

sasl/src/error.rs

@@ -1,8 +1,11 @@
 use openssl::error::ErrorStack;
 
+/// A wrapper enum for things that could go wrong in this crate.
 #[derive(Debug)]
 pub enum Error {
+    /// An error in OpenSSL.
     OpenSslErrorStack(ErrorStack),
+    /// An error in a SASL mechanism.
     SaslError(String),
 }