HTTP 1.1 issue 12: 10.4.8 407 Proxy Authentication Required

In section 10.4.8 "407 Proxy Authentication Required", the statement

   "This code is similar to 401 (Unauthorized), but indicates that
   the client MUST first authenticate itself with the proxy."

is not a requirement, so the "MUST" should be changed to "must".

Ross Patterson
VM Software Division
Sterling Software, Inc.