-// Server-to-server private message encryption (RINO) is allowed by default.
-// Encryption will only be provided if this setting is true and the
-// PHP mcrypt extension is installed on both systems
+// Server-to-server private message encryption (RINO) is allowed by default.
+// Encryption will only be provided if this setting is set to a non zero
+// value and the PHP mcrypt extension is installed on both systems
+// set to 0 to disable, 2 to enable, 1 is deprecated but wont need mcrypt