[Dillo-dev] [patch]: html.cc: DilloHtmlInput::connectTo()

This implements DilloHtmlInput::connectTo() which is called by DilloHtmlForm::addInput and connects the input to the form. This is another API milestone: now only DilloHtmlForm methods access DilloHtmlForm::form_receiver . We are nearly done with the DilloHtmlForm API, there only a few locations left that directly access DilloHtmlForm data members. Regards,