--- a/jdk/src/share/lib/security/java.security	Mon Jul 02 14:11:44 2012 -0700
+++ b/jdk/src/share/lib/security/java.security	Tue Jul 03 14:56:58 2012 -0400
@@ -1,6 +1,28 @@
 #
 # This is the "master security properties file".
 #
+# An alternate java.security properties file may be specified
+# from the command line via the system property
+#
+#    -Djava.security.properties=<URL>
+#
+# This properties file appends to the master security properties file.
+# If both properties files specify values for the same key, the value
+# from the command-line properties file is selected, as it is the last
+# one loaded.
+#
+# Also, if you specify
+#
+#    -Djava.security.properties==<URL> (2 equals),
+#
+# then that properties file completely overrides the master security
+# properties file.
+#
+# To disable the ability to specify an additional properties file from
+# the command line, set the key security.overridePropertiesFile
+# to false in the master security properties file. It is set to true
+# by default.
+
 # In this file, various security properties are set for use by
 # java.security classes. This is where users can statically register
 # Cryptography Package Providers ("providers" for short). The term