[check] how to (re)create a malformed multipart post error

Related to the action item about malformed multipart errors, here's a 
quick query to recreate the error (might be useflu for testing).

[[
shell% telnet validator.w3.org 80
Trying 128.30.52.13...
Connected to lovejoy.w3.org.
Escape character is '^]'.
POST /check HTTP/1.1
Host: validator.w3.org
Content-Type: multipart/form-data; boundary=--foo

]]

Note that the status code is not a 500 but a 200.

-- 
olivier