[whatwg] Web Socket Protocol: How Lenient Server Should Be in Handshake?

Hi,

As far as I can read from
http://tools.ietf.org/html/draft-hixie-thewebsocketprotocol-54#section-5.2
the server should (or must?) accept requests starting with, say:
    POST<SPACE>/some/resource<SPACE>HTTP/1.0
or, even
    <SPACE>/some/resource<SPACE>

Is a server expected to be this lenient?

Yuzo