Item10860: add Configure/Checkers/Plugins README

So that pseudo-install can work properly.

Alternatively, somebody could fix pseudo-install.

git-svn-id: http://svn.foswiki.org/branches/Release01x01@12173 0b4bb1d4-4e5a-0410-9cc4-b2b747904278

core/lib/Foswiki/Configure/Checkers/Plugins/README

@@ -0,0 +1,10 @@
+This is the directory where you should find checkers for plugins.
+
+For example, if you wanted a configure checker on
+$Foswiki::cfg{Plugins}{MyPlugin}{Enabled}, you would create MyPlugin/Enabled.pm
+under this directory.
+
+This README file has been added so that this directory is not empty, a cheap
+work-around to a pseudo-install flaw, see http://foswiki.org/Tasks/Item10860
+
+This file doesn't need to be shipped in official Foswiki releases