fix(rustup): switch to unstable features

src/header/common/access_control/allow_headers.rs

@@ -10,7 +10,7 @@ use header;
 /// > during the actual request.
 ///
 /// Spec: www.w3.org/TR/cors/#access-control-allow-headers-response-header
-#[derive(Clone, PartialEq, Show)]
+#[derive(Clone, PartialEq, Debug)]
 pub struct AccessControlAllowHeaders(pub Vec<String>);
 
 impl header::Header for AccessControlAllowHeaders {

src/header/common/access_control/allow_methods.rs

@@ -11,7 +11,7 @@ use method;
 /// > actual request.
 ///
 /// Spec: www.w3.org/TR/cors/#access-control-allow-methods-response-header
-#[derive(Clone, PartialEq, Show)]
+#[derive(Clone, PartialEq, Debug)]
 pub struct AccessControlAllowMethods(pub Vec<method::Method>);
 
 impl header::Header for AccessControlAllowMethods {

src/header/common/access_control/allow_origin.rs

@@ -13,7 +13,7 @@ use header;
 /// > "*", or "null" in the response.
 ///
 /// Spec: www.w3.org/TR/cors/#access-control-allow-origin-response-header
-#[derive(Clone, PartialEq, Show)]
+#[derive(Clone, PartialEq, Debug)]
 pub enum AccessControlAllowOrigin {
     /// Allow all origins
     AllowStar,

src/header/common/access_control/max_age.rs

@@ -9,7 +9,7 @@ use header;
 /// > preflight request can be cached in a preflight result cache.
 ///
 /// Spec: www.w3.org/TR/cors/#access-control-max-age-response-header
-#[derive(Clone, Copy, PartialEq, Show)]
+#[derive(Clone, Copy, PartialEq, Debug)]
 pub struct AccessControlMaxAge(pub u32);
 
 impl header::Header for AccessControlMaxAge {

src/header/common/access_control/request_headers.rs

@@ -9,7 +9,7 @@ use header;
 /// > be used in the actual request as part of the preflight request.
 ///
 /// Spec: www.w3.org/TR/cors/#access-control-request-headers-request-header
-#[derive(Clone, PartialEq, Show)]
+#[derive(Clone, PartialEq, Debug)]
 pub struct AccessControlRequestHeaders(pub Vec<String>);
 
 impl header::Header for AccessControlRequestHeaders {

src/header/common/access_control/request_method.rs

@@ -10,7 +10,7 @@ use method::Method;
 /// > used in the actual request as part of the preflight request.
 ///
 /// Spec: www.w3.org/TR/cors/#access-control-request-method-request-header
-#[derive(Clone, PartialEq, Show)]
+#[derive(Clone, PartialEq, Debug)]
 pub struct AccessControlRequestMethod(pub Method);
 
 impl header::Header for AccessControlRequestMethod {