Description of problem:
If a WLAN interface uses WPA it won't start on boot bcause wpa_supplicant is not
up yet. As a result, various services that require an active network connection
(e.g. ntp) fail as well.

Version-Release number of selected component (if applicable):
8.45.14.EL-1.el5.centos.1, but I think it's identical to RHEL in the affected
parts. 

How reproducible:
Always.

Additional info:
See also bug #244029. Here's an alternative solution It won't work if /usr isn't
mounted, but it's better than nothing:

--- ifup-wireless.orig  2007-10-29 00:57:52.000000000 +0100
+++ ifup-wireless       2007-10-29 00:58:09.000000000 +0100
@@ -88,6 +88,11 @@
     iwpriv $DEVICE $IWPRIV
 fi

+if [ "$WPA" = "yes" -a -x /usr/sbin/wpa_supplicant ]; then
+    kill -9 `ps aux |grep wpa_supplicant |grep i$DEVICE |awk '{print $2 }'` &>
/dev/null
+    /usr/sbin/wpa_supplicant -B -Dwext -i$DEVICE
-c/etc/wpa_supplicant/wpa_supplicant.conf -d -w
+fi
+
 # ESSID need to be last : most device re-perform the scanning/discovery
 # when this is set, and things like encryption keys are better be
 # defined if we want to discover the right set of APs/nodes.