Additionally:
* Use system libcurl, so the patch downloader can work
* Use system zlib
* Use system libusb
* Add note about using system WolfSSL
* Enable SDL2, so the FAudio backend can work
* Change license to gpl2Only, as per [1]
[1]: https://github.com/RPCS3/rpcs3/issues/10255#issuecomment-835512840