HEAD / HTTP/1.1
Host: default
Accept: a/b ; blah="\

HEAD / HTTP/1.1
Host: default
Accept: a/b ; blah="x

HEAD / HTTP/1.1
Host: default
Accept: */* ; q = 1.

HEAD / HTTP/1.1
Host: default
Accept: text/* ; q = 

HEAD / HTTP/1.1
Host: default
Accept: text/plain  X

HEAD / HTTP/1.1
Host: default
Accept: text/plain ; X =
Connection: close

