Add insecureHTTPParser Parameter (#856)

Keep whitespace consistent

README.md

@@ -446,7 +446,8 @@ The default values are shown after each option key.
     compress: true,         // support gzip/deflate content encoding. false to disable
     size: 0,                // maximum response body size in bytes. 0 to disable
     agent: null,            // http(s).Agent instance or function that returns an instance (see below)
-    highWaterMark: 16384    // the maximum number of bytes to store in the internal buffer before ceasing to read from the underlying resource.
+    highWaterMark: 16384,   // the maximum number of bytes to store in the internal buffer before ceasing to read from the underlying resource.
+    insecureHTTPParser: false	// Use an insecure HTTP parser that accepts invalid HTTP headers when `true`.
 }
 ```
 
@@ -537,6 +538,11 @@ const fetch = require('node-fetch');
 })();
 ```
 
+#### Insecure HTTP Parser
+
+Passed through to the `insecureHTTPParser` option on http(s).request. See [`http.request`](https://nodejs.org/api/http.html#http_http_request_url_options_callback) for more information.
+
+
 <a id="class-request"></a>
 
 ### Class: Request

src/request.js

@@ -100,6 +100,7 @@ export default class Request extends Body {
 		this.counter = init.counter || input.counter || 0;
 		this.agent = init.agent || input.agent;
 		this.highWaterMark = init.highWaterMark || input.highWaterMark || 16384;
+		this.insecureHTTPParser = init.insecureHTTPParser || input.insecureHTTPParser || false;
 	}
 
 	get method() {
@@ -214,6 +215,7 @@ export const getNodeRequestOptions = request => {
 		href: parsedURL.href,
 		method: request.method,
 		headers: headers[Symbol.for('nodejs.util.inspect.custom')](),
+		insecureHTTPParser: request.insecureHTTPParser,
 		agent
 	};