Added Kaseya uploadImage exploit.
Fix the arch declaration in uploaded module.
Use MSF::Exploit:FileDropper to register the uploaded file for cleanup.
Fixed reference format
Updated module to comply with indentation standard and to use suggestions from reviewers
Use res.get_cookies instead of homebrew parse. Use _cgi
Update based on jvazquez's suggestions.
Do minor clean up for kaseya_uploadimage_file_upload
Land #2648, @pnegry's exploit for Kaseya File Upload