[Varnish] #1604: Reject request lines that don't conform to the Request-URI definition in HTTP/1.1

[Varnish]

#1604: Reject request lines that don't conform to the Request-URI definition in
HTTP/1.1
--------------------------+----------------------
 Reporter:  mattrobenolt  |       Type:  defect
   Status:  new           |   Priority:  normal
Milestone:                |  Component:  varnishd
  Version:  trunk         |   Severity:  normal
 Keywords:  http          |
--------------------------+----------------------
 Right now, Varnish just happily accepts a request like:

 {{{
 GET Foo HTTP/1.1
 }}}

 Which is not a valid `Reqest-URI` as defined by RFC2616 section 5.1.2 as:

 {{{
 Request-URI    = "*" | absoluteURI | abs_path | authority
 }}}

 And in this case, `abs_path` is defined as

 {{{
 abs_path      = "/"  path_segments
 }}}

 The `absoluteURI` case is already being handled, but we are failing to
 handle `*` or `abs_path` according to RFC2396.

 This also covers the case of `authority` since an `authority` must be
 prefixed with a `//`.

-- 
Ticket URL: <https://www.varnish-cache.org/trac/ticket/1604>
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