Created attachment 3109 
configure.in.in patch

I have found that when building xfce4-session-4.7.0 with consolekit enabled and
policykit disabled, the configure script results in consolekit disabled and
policykit enabled.

After poking around in the configure.in, I found 2 problems:

1) There's a typo in the policykit test ("x$ac_cv_enable_polkit" = !"xyes"
should be "x$ac_cv_enable_polkit" != "xyes").

2) The AC_ARG_ENABLE macros and following tests use a custom variable name,
which is undefined when the configure flag is present.