Clarify the OutboundBindAddressOR documentation in the sample torrc

Part of 22145

src/config/torrc.sample.in

@@ -96,7 +96,8 @@
 ## If you have multiple network interfaces, you can specify one for
 ## outgoing traffic to use.
 ## OutboundBindAddressExit will be used for all exit traffic, while
-## OutboundBindAddressOR will be used for all other connections.
+## OutboundBindAddressOR will be used for all OR and Dir connections
+## (DNS connections ignore OutboundBindAddress).
 ## If you do not wish to differentiate, use OutboundBindAddress to
 ## specify the same address for both in a single line.
 #OutboundBindAddressExit 10.0.0.4