- Add missing virtual destructor on `SSLBackend`.
- On Windows, filter out `POLLWRBAND` (one of the new flags added) when
calling `WSAPoll`, because despite the constant being defined on
Windows, passing it calls `WSAPoll` to yield `EINVAL`.
- Reduce OpenSSL version requirement to satisfy CI; I haven't tested
whether it actually builds (or runs) against 1.1.1, but if not, I'll
figure it out.
- Change an instance of memcpy to memmove, even though the arguments
cannot overlap, to avoid a [strange GCC
error](https://github.com/yuzu-emu/yuzu/pull/10912#issuecomment-1606283351).
4a35569921