Added to the response headers doc example to show how to send multi-valued response headers
Added to the response headers doc example to show how to send multi-valued response headers

tomakehurst/wiremock,dlaha21/wiremock,tomakehurst/wiremock,dlaha21/wiremock,Mahoney/wiremock,Mahoney/wiremock,tomakehurst/wiremock,tomakehurst/wiremock,tomakehurst/wiremock,Mahoney/wiremock,Mahoney/wiremock,Mahoney/wiremock,dlaha21/wiremock,dlaha21/wiremock,dlaha21/wiremock