Note an exception to when we use OutboundBindAddress

doc/tor.1.txt

@@ -320,7 +320,8 @@ Other options can be specified either on the command-line (--option
 **OutboundBindAddress** __IP__::
     Make all outbound connections originate from the IP address specified. This
     is only useful when you have multiple network interfaces, and you want all
-    of Tor's outgoing connections to use a single one.
+    of Tor's outgoing connections to use a single one.  This setting will be
+    ignored for connections to the loopback addresses (127.0.0.0/8 and ::1).
 
 **PidFile** __FILE__::
     On startup, write our PID to FILE. On clean shutdown, remove