HEAD / HTTP/1.0
Connection: keep-alive

HEAD / HTTP/1.1
Host: foo.exAMPLE.com

HEAD / HTTP/1.1
Host: foo.exAMPLE.COM

HEAD / HTTP/1.1
If-Match: "f.e.c/1"
Host: foo.exAMPLE.COM

HEAD / HTTP/1.1
If-None-Match: "f.e.c/1"
Host: foo.exAMPLE.COM

HEAD / HTTP/1.1
If-Match: "f.e.c/2"
Host: foo.example.COM

HEAD / HTTP/1.1
If-None-Match: "f.e.c/2"
Host: foo.example.COM

HEAD / HTTP/1.1
If-Match: "f.e.c/4"
Host: foo.example.com

HEAD / HTTP/1.1
If-None-Match: "f.e.c/4"
Host: foo.example.com

HEAD /index.html HTTP/1.0
Connection: close

