#23 TCONFrame.WriteToStream() corrupts some content types

[Chris Woodbury]

TCONFrame.WriteToStream() does not properly handle
content types beginning with '('. WriteToStream()
correctly replaces a single "(" with two, but it does
not undo the replacement after the content type is
written. Also, it does not distinguish between a
content type starting with a single "(" and one
starting with multiple "("'s.