Implement HttpTryFrom<HashMap<String,String>> for HeaderMap (#326)

src/convert.rs

@@ -55,6 +55,7 @@ reflexive! {
     Uri,
     Method,
     StatusCode,
+    HeaderMap,
     HeaderName,
     HeaderValue,
     Scheme,

src/header/map.rs

@@ -1,6 +1,3 @@
-use super::name::{HdrName, HeaderName, InvalidHeaderName};
-use super::HeaderValue;
-
 use std::collections::HashMap;
 use std::collections::hash_map::RandomState;
 use std::hash::{BuildHasher, Hash, Hasher};
@@ -30,6 +27,7 @@ pub use self::into_header_name::IntoHeaderName;
 /// ```
 /// # use http::HeaderMap;
 /// # use http::header::{CONTENT_LENGTH, HOST, LOCATION};
+/// # use http::HttpTryFrom;
 /// let mut headers = HeaderMap::new();
 ///
 /// headers.insert(HOST, "example.com".parse().unwrap());
@@ -3337,7 +3335,7 @@ mod as_header_name {
     use super::{Entry, HdrName, HeaderMap, HeaderName, InvalidHeaderName};
 
     /// A marker trait used to identify values that can be used as search keys
-    /// to a `HeaderMap`.
+                    /// to a `HeaderMap`.
     pub trait AsHeaderName: Sealed {}
 
     // All methods are on this pub(super) trait, instead of `AsHeaderName`,