Make cookies an optional feature (default off)

src/blocking/client.rs

@@ -392,6 +392,11 @@ impl ClientBuilder {
     ///     .build()
     ///     .unwrap();
     /// ```
+    ///
+    /// # Optional
+    ///
+    /// This requires the optional `cookies` feature to be enabled.
+    #[cfg(feature = "cookies")]
     pub fn cookie_store(self, enable: bool) -> ClientBuilder {
         self.with_inner(|inner| inner.cookie_store(enable))
     }

src/blocking/response.rs

@@ -11,6 +11,7 @@ use serde::de::DeserializeOwned;
 
 use super::client::KeepCoreThreadAlive;
 use super::wait;
+#[cfg(feature = "cookies")]
 use crate::cookie;
 use crate::{async_impl, StatusCode, Url, Version};
 
@@ -121,6 +122,11 @@ impl Response {
     /// Retrieve the cookies contained in the response.
     ///
     /// Note that invalid 'Set-Cookie' headers will be ignored.
+    ///
+    /// # Optional
+    ///
+    /// This requires the optional `cookies` feature to be enabled.
+    #[cfg(feature = "cookies")]
     pub fn cookies<'a>(&'a self) -> impl Iterator<Item = cookie::Cookie<'a>> + 'a {
         cookie::extract_response_cookies(self.headers()).filter_map(Result::ok)
     }