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  1. WildFly
  2. WFLY-6984

Improve log message for Undertow HTTP2 when ALPN not available

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      In case that Jetty ALPN is not available and HTTP2 is configured on HTTPS listener, Undertow prints error log message about it. Please direct user to documentation and also advice him how to get rid of this message otherwise.

      Proposed change to:

      Jetty ALPN not found on the boot class path. HTTP2 and SPDY are not available. Please check documentation how to configure Undertow to use HTTP2 or disable HTTP2 for HTTPS listeners to avoid this error message.
      

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            sdouglas1@redhat.com Stuart Douglas
            jstourac@redhat.com Jan Stourac
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