clarify that when we say 'above the median' we mean 'at least

the median'


svn:r10899

doc/spec/dir-spec.txt

@@ -947,10 +947,10 @@ $Id$
    either in the top 7/8ths for known active routers or at least 100KB/s.
 
    "Guard" -- A router is a possible 'Guard' if it is 'Stable' and its
-   bandwidth is either above median for known active routers or at least
-   250KB/s. If the total bandwidth of active non-BadExit Exit servers
-   is less than one third of the total bandwidth of all active servers,
-   no Exit is listed as a Guard.
+   bandwidth is either at least the median for known active routers or
+   at least 250KB/s. If the total bandwidth of active non-BadExit Exit
+   servers is less than one third of the total bandwidth of all active
+   servers, no Exit is listed as a Guard.
 
    "Authority" -- A router is called an 'Authority' if the authority
    generating the network-status document believes it is an authority.