fix(lib): Fixed typos in multiple modules

BREAKING CHANGE: The `Preference` header had a typo in a variant and it's string representation,
  change `Preference::HandlingLeniant` to `Preference::HandlingLenient`.

src/header/common/access_control_allow_origin.rs

@@ -88,7 +88,7 @@ impl Display for AccessControlAllowOrigin {
 }
 
 #[cfg(test)]
-mod test_access_control_allow_orgin {
+mod test_access_control_allow_origin {
     use header::*;
     use super::AccessControlAllowOrigin as HeaderField;
     test_header!(test1, vec![b"null"]);

src/header/common/content_location.rs

@@ -3,7 +3,7 @@ header! {
     /// [RFC7231](https://tools.ietf.org/html/rfc7231#section-3.1.4.2)
     ///
     /// The header can be used by both the client in requests and the server
-    /// in resposes with different semantics. Client sets `Content-Location`
+    /// in responses with different semantics. Client sets `Content-Location`
     /// to refer to the URI where original representation of the body was
     /// obtained.
     ///

src/header/common/last-event-id.rs

@@ -7,7 +7,7 @@ header! {
     /// track of event state. This is helpful when working
     /// with [Server-Sent-Events](http://www.html5rocks.com/en/tutorials/eventsource/basics/). If the connection were to be dropped, for example, it'd
     /// be useful to let the server know what the last event you
-    /// recieved was.
+    /// received was.
     ///
     /// The spec is a String with the id of the last event, it can be
     /// an empty string which acts a sort of "reset".

src/header/common/origin.rs

@@ -71,7 +71,7 @@ impl FromStr for Origin {
             Some(idx) => idx,
             None => return Err(::Error::Header)
         };
-        // idx + 3 because thats how long "://" is
+        // idx + 3 because that's how long "://" is
         let (scheme, etc) = (&s[..idx], &s[idx + 3..]);
         let host = try!(Host::from_str(etc));
 

src/header/common/prefer.rs

@@ -87,8 +87,8 @@ pub enum Preference {
     ReturnMinimal,
     /// "handling=strict"
     HandlingStrict,
-    /// "handling=leniant"
-    HandlingLeniant,
+    /// "handling=lenient"
+    HandlingLenient,
     /// "wait=delta"
     Wait(u32),
 
@@ -105,7 +105,7 @@ impl fmt::Display for Preference {
             ReturnRepresentation => "return=representation",
             ReturnMinimal => "return=minimal",
             HandlingStrict => "handling=strict",
-            HandlingLeniant => "handling=leniant",
+            HandlingLenient => "handling=lenient",
 
             Wait(secs) => return write!(f, "wait={}", secs),
 
@@ -148,7 +148,7 @@ impl FromStr for Preference {
                     ("return", "representation") => if rest.is_empty() { Ok(ReturnRepresentation) } else { Err(None) },
                     ("return", "minimal") => if rest.is_empty() { Ok(ReturnMinimal) } else { Err(None) },
                     ("handling", "strict") => if rest.is_empty() { Ok(HandlingStrict) } else { Err(None) },
-                    ("handling", "leniant") => if rest.is_empty() { Ok(HandlingLeniant) } else { Err(None) },
+                    ("handling", "lenient") => if rest.is_empty() { Ok(HandlingLenient) } else { Err(None) },
                     ("wait", secs) => if rest.is_empty() { secs.parse().map(Wait).map_err(Some) } else { Err(None) },
                     (left, right) => Ok(Extension(left.to_owned(), right.to_owned(), rest))
                 }
@@ -172,9 +172,9 @@ mod tests {
 
     #[test]
     fn test_parse_argument() {
-        let prefer = Header::parse_header(&"wait=100, handling=leniant, respond-async".into());
+        let prefer = Header::parse_header(&"wait=100, handling=lenient, respond-async".into());
         assert_eq!(prefer.ok(), Some(Prefer(vec![Preference::Wait(100),
-                                           Preference::HandlingLeniant,
+                                           Preference::HandlingLenient,
                                            Preference::RespondAsync])))
     }
 

src/header/common/upgrade.rs

@@ -74,7 +74,7 @@ header! {
     }
 }
 
-/// A protocol name used to identify a spefic protocol. Names are case-sensitive
+/// A protocol name used to identify a specific protocol. Names are case-sensitive
 /// except for the `WebSocket` value.
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub enum ProtocolName {