 * bugfix:    * no servers key    * lead to an exception from setOptions()
 * bugfix:
   * no servers key
   * lead to an exception from setOptions()

webonyx/Rediska,r-kovalenko/Rediska,AlphaStaxLLC/Rediska,AlphaStaxLLC/Rediska,Shumkov/Rediska,r-kovalenko/Rediska,Shumkov/Rediska