>From the manual:
<snip>
hdr(name) The HTTP header <name> will be looked up in each HTTP request.
Just as with the equivalent ACL 'hdr()' function, the header
name in parenthesis is not case sensitive. If the header is
absent or if it does not contain any value, the round-robin
algorithm is applied instead.
</snip>
So this balancing scheme falls back to round-robin if the header is
not found, what method is used if it is?..does it hash on the value of
the header (or the name of the header)?
This question could extend to url_param, so if the param is found in
the GET string or in the body of the POST, what next? What balance
method is used?
