Prep for release

CHANGES

 OpenLDAP 2.4 Change Log
 
-OpenLDAP 2.4.31 Engineering
+OpenLDAP 2.4.31 Release (2012/04/21)
 	Added slapo-accesslog support for reqEntryUUID (ITS#6656)
 	Fixed libldap IPv6 URL detection (ITS#7194)
 	Fixed libldap rebinding on failed connection (ITS#7207)

build/version.var

@@ -15,9 +15,9 @@
 ol_package=OpenLDAP
 ol_major=2
 ol_minor=4
-ol_patch=X
-ol_api_inc=20430
+ol_patch=31
+ol_api_inc=20431
 ol_api_current=10
 ol_api_revision=3
 ol_api_age=8
-ol_release_date="2012/02/29"
+ol_release_date="2012/04/21"