add a "docs" to the manual URI as listed in torrc.sample.in

changes/manual_uri_in_torrc

+  o Minor bugfixes (documentation):
+   - Fix the URL for the online version of the manual that's listed in
+     torrc.sample.

src/config/torrc.sample.in

@@ -6,7 +6,7 @@
 ## that begin with just "#" are disabled commands: you can enable them
 ## by removing the "#" symbol.
 ##
-## See 'man tor', or https://www.torproject.org/tor-manual.html,
+## See 'man tor', or https://www.torproject.org/docs/tor-manual.html,
 ## for more options you can use in this file.
 ##
 ## Tor will look for this file in various places based on your platform: