Fix sbin/upgrade.pl so that it handles forking upgrade scripts without

overwriting the config file changes in earlier upgrade scripts.

docs/changelog/7.x.x.txt

@@ -19,6 +19,7 @@
  - fixed #9352: Account activation message MIA
  - fixed #9046: Wiki tabs all combined (David Delikat)
  - refixed #9147: Misspellings in Account
+ - fixed #9348: Required Upgrade Step Not Documented - 7.6.0
 
 7.6.7
  - fixed #9263: Thingy possibleValues processing, and List type autodetection.

lib/WebGUI/Config.pm

@@ -64,6 +64,24 @@ These subroutines are available from this package:
 
 #-------------------------------------------------------------------
 
+=head2 clearCache ( ) 
+
+Clear the cache of in-memory configuration files.  This is required by the upgrade script, which
+forks to run each upgrade.  When the child is reaped, the original is untouched, so that the
+next script in the line recieves an old, in-memory config, essentially undoing any config
+changes in the first upgrade script.
+
+This is a class method.
+
+=cut
+
+sub clearCache {
+	my $class = shift;
+    %config = ();
+}
+
+#-------------------------------------------------------------------
+
 =head2 getCookieName ( ) 
 
 Returns the cookie name defined in the config file. Returns "wgSession" if one isn't defined.

sbin/upgrade.pl

@@ -243,10 +243,12 @@ foreach my $filename (keys %config) {
                 print "\tProcessing upgrade executable failed!\n";
                 fatalError();
             }
+            ##Do a dummy load of the config
+            WebGUI::Config->clearCache();
 		}
 		$config{$filename}{version} = $upgrade{$upgrade}{to};
 		$notRun = 0;
-                sleep 1; # Sleep a second to avoid adding asset revisions too quickly
+        sleep 1; # Sleep a second to avoid adding asset revisions too quickly
 	}
 	my $session = WebGUI::Session->open($webguiRoot,$filename);
 	print "\tSetting site upgrade completed..." unless ($quiet);