Bug 1468398: Enable keep-alive connections in wdclient for wdspec tests. r=whimboo

MozReview-Commit-ID: IOm4u42ihgR

--HG--
extra : rebase_source : 57a4483d6fc37c0875f7db62059746ad12cf3bb8

testing/web-platform/tests/tools/webdriver/webdriver/transport.py

@@ -144,6 +144,7 @@ class HTTPWireProtocol(object):
 
         if headers is None:
             headers = {}
+        headers.update({'Connection': 'keep-alive'})
 
         url = self.url(uri)