SSLContext.getInstance currently throws NoSuchAlgorithmException if a protocol is not supported by any of the configured providers.

If a protocol is disabled by an implementation, then the getInstance method still succeeds, because there is still a provider configured that supports the protocol.

However, if the application subsequently tries to use that protocol, an `SSLHandshakeException` will be thrown. This behavior could be seen as a little unexpected, since the `SSLContext` was returned for that protocol.

Thus, it would be useful to add an implementation note to SSLContext.getInstance noting this behavior.