Fixed the code that shouldn't have worked without AsciiExt.

src/client/server/mod.rs

@@ -45,6 +45,8 @@
 //! }).unwrap();
 //! # }
 //! ```
+#[cfg(feature = "ctcp")]
+use std::ascii::AsciiExt;
 use std::collections::HashMap;
 use std::path::Path;
 use std::sync::{Arc, Mutex, RwLock};

src/proto/command.rs

@@ -1,4 +1,5 @@
 //! Enumeration of all available client commands.
+use std::ascii::AsciiExt;
 use std::str::FromStr;
 
 use error::MessageParseError;