code: @Deprecated
      public static SslContext newClientContext(SslProvider provider, File certChainFile) throws SSLException {
          return newClientContext(provider, certChainFile, null);
      }
docs: Creates a new client-side {@link SslContext}.
  
  @param provider the {@link SslContext} implementation to use.
  {@code null} to use the current default one.
  @param certChainFile an X.509 certificate chain file in PEM format.
  {@code null} to use the system default
  
  @return a new client-side {@link SslContext}
  @deprecated Replaced by {@link SslContextBuilder}