Update to 8.5.39

Changelog:
    The APR/Native connector now supports both OpenSSL and JSSE
    TLS configuration syntax (NIO and NIO2 already support this)

    Various improvements to NIO2

    Various fixes for HTTP/2 push requests

    Refactor error handling so that errors that occur early in
    request processing are handled by the application's error
    handling where the application can be identified

(ryoon)