[PATCH 04 of 22] wireproto: drop the _decompress method in favor a new call type

[Pierre-Yves David]

>     @@ -386,10 +386,23 @@ class wirepeer(peer.peerrepository):
>               The command is expectid to return a stream.
>
>               return server reply as a file like object."""
>               raise NotImplementedError()
>
>     +    def _callcompressable(self, cmd, **args):
>     +        """execute <cmd> on the server
>     +
>     +        The command is expected to return a stream.
>     +
>     +        The stream may have been compressed in some implemented.
>     This function
>     +        takes care of the decompression. This is the only
>     difference with
>     +        _callstream.
>     +
>     +        return serve5r replay as a file like object.
>
> Do you men 'server' and 'reply' here?

I do. (fixing a typo during the last pass, adds two…)