Author: Christos Tsantilas <chtsanti@users.sourceforge.net>

Author: Christos Tsantilas <chtsanti@users.sourceforge.net>
Bug 2308: Segmentation fault in AuthDigestUserRequest::authUser

In this patch:
 - In method AuthDigestConfig::decode just do not delete the digest_request on
errors  but use it as is in the authDigestLogUsername functions.

 - In the method AuthDigestConfig::fixHeader change the line  "int stale = 1;"
to "int stale = 0;" to make squid respond with  "stale=false" in the first
unauthenticated request of web client.