http: don't default OPTIONS to chunked encoding

Signed-off-by: Trevor Norris <trev.norris@gmail.com>
Signed-off-by: Fedor Indutny <fedor@indutny.com>

lib/_http_client.js

@@ -119,6 +119,7 @@ function ClientRequest(options, cb) {
   if (method === 'GET' ||
       method === 'HEAD' ||
       method === 'DELETE' ||
+      method === 'OPTIONS' ||
       method === 'CONNECT') {
     self.useChunkedEncodingByDefault = false;
   } else {

test/simple/test-http-client-default-headers-exist.js

@@ -27,6 +27,7 @@ var expectedHeaders = {
   'DELETE': ['host', 'connection'],
   'GET': ['host', 'connection'],
   'HEAD': ['host', 'connection'],
+  'OPTIONS': ['host', 'connection'],
   'POST': ['host', 'connection', 'transfer-encoding'],
   'PUT': ['host', 'connection', 'transfer-encoding']
 };