Wrong HttpMethod applied by AuthContext::new_post #2

The code

pub fn new_post<'n:'a, 'p:'a, 'u:'a, 'b:'a>(
        username : &'n str,
        password : &'p str,
        uri : &'u str,
        body : Option<&'b [u8]>
    ) -> Self {
        Self::new_with_method(username, password, uri, body, HttpMethod::GET)
    }

is applying the GET method instead of the POST method. This causes the md5(method:uri) value to be incorrectly calculated and so causes post requests to fail

Good catch, I suppose I never used that function ;)

I'll fix it ASAP

oops took a while, finally fixed