Fix issue #125: don't do a reverse lookup during initialization of the  Negotiate authn scheme for proxies.
Fix issue #125: don't do a reverse lookup during initialization of the 
Negotiate authn scheme for proxies.

* auth/auth_spnego.c
  (do_auth): Remove apr_getnameinfo, use ip address or proxy hostname provided
      by the application.

jandre/serf,jandre/serf,jandre/serf,jandre/serf