patch to allow empty passwords in http client basic authorization

[Tim Fletcher-5]

Use case: some web services use basic auth, with a token as the user
part and no password part.

Curl has support for this.


--- httpc_request.erl 2009-03-12 12:31:41.000000000 +0000
+++ httpc_request.patched.erl 2009-05-05 10:45:00.000000000 +0100
@@ -201,6 +201,9 @@
  [User, Passwd] ->
     UserPasswd = base64:encode_to_string(User ++ ":" ++ Passwd),
     Headers#http_request_h{authorization = "Basic " ++ UserPasswd};
+ [User] ->
+    UserPasswd = base64:encode_to_string(User ++ ":"),
+    Headers#http_request_h{authorization = "Basic " ++ UserPasswd};
  _ ->
     Headers
     end.
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