Add custom sslcontext support in fili

[Chandrasekar-Rajasekar]

User must override getSSLContext method to give their own sslContext. The function should return the object of io.netty.handler.ssl.SslContext.

protected SslContext getSSLContext() {
        //create SSL Context here
       if(sslContext.instanceOf(io.netty.handler.ssl.SslContext.class)) 
              return sslContext;
       if(sslContext.instanceOf(javax.net.ssl.SSLContext.class))
              return new JdkSslContext(sslContext, true, ClientAuth.REQUIRE)
      .
      .
      .
      return null
}

I confirm that this contribution is made under the terms of the license found in the root directory of this repository's source tree and that I have the authority necessary to make this contribution on behalf of its copyright owner.

[michael-mclawhorn]

definitely need a change to CHANGELOG, and you should probably create an issue to link to in the changelog ticket.

Should also add a test to config that this code gets excercised.

[michael-mclawhorn]

Add to comment:

If null, the system default SSL Context will be applied

[michael-mclawhorn]

I had one small documentation change. Otherwise feel free to update in preparation for merging.