[ee122] Project 1b error codes

[Vern Paxson]

> e.g.
> should it be:
> GETa /index.html HTTP/1.0 --> Invalid Request-URI token: a /index.html 
> HTTP/1.0
> or:
> GETa /index.html HTTP/1.0 --> Invalid Request-URI token: a
> 
> and
> 
> should it be:
> GET /index.html~~~~ HTTP/1.0 --> Invalid Request-URI token: /index.html~~~~
> or
> GET /index.html~~~~ HTTP/1.0 --> Invalid Request-URI token: 
> /index.html~~~~ HTTP/1.0

Any of these are fine (except if in the last one you mean to introduce a
newline, you should avoid that, as it makes it harder to grade).  It would
also be fine for the first example to instead say "Invalid Request-Method".

Basically, there needs to be an error message and it needs to correctly
point out a problem with the line, but that's it.

		Vern