Index: openacs-4/packages/acs-bootstrap-installer/tcl/00-proc-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-bootstrap-installer/tcl/00-proc-procs.tcl,v
diff -u -r1.42.2.1 -r1.42.2.2
--- openacs-4/packages/acs-bootstrap-installer/tcl/00-proc-procs.tcl	17 Aug 2015 16:43:55 -0000	1.42.2.1
+++ openacs-4/packages/acs-bootstrap-installer/tcl/00-proc-procs.tcl	20 Aug 2015 10:57:13 -0000	1.42.2.2
@@ -8,12 +8,16 @@
 
 
 #
-# Safetybelt for ::acs::useNsfProc for upgrade phase
+# Safetybelt for ::acs::useNsfProc for upgrade phase to oacs-5-9
 #
 if {![info exists ::acs::useNsfProc]} {
     ns_log notice "use fallback value for ::acs::useNsfProc"
     set ::acs::useNsfProc 0
 }
+if {![info exists ::acs::useNaviServer]} {
+    ns_log notice "use fallback value for ::acs::useNaviServer"
+    set ::acs::useNaviServer [expr {[ns_info name] eq "NaviServer"}]
+}
 
 proc number_p { str } {
     return [regexp {^[-+]?[0-9]*(.[0-9]+)?$} $str]