clean up SASL code

src/sasl/mechanisms/anonymous.rs

@@ -0,0 +1,15 @@
+//! Provides the SASL "ANONYMOUS" mechanism.
+
+use sasl::SaslMechanism;
+
+pub struct Anonymous;
+
+impl Anonymous {
+    pub fn new() -> Anonymous {
+        Anonymous
+    }
+}
+
+impl SaslMechanism for Anonymous {
+    fn name() -> &'static str { "ANONYMOUS" }
+}