Dir spec change: Clarify rules on how to treat servers based on networkstatus values. Is this sane?

svn:r5004

doc/dir-spec.txt

@@ -222,9 +222,13 @@ $Id$
        status is "live" if it is the most recently downloaded network status
        document for a given directory server, and the server is a directory
        server trusted by the client, and the network-status document is no
-       more than D (say, 10) days old.
-     - A server is "live" if it is listed as running by at more-than-half of
-       the last N (three) "live" downloaded network-status documents.
+       more than D (say, 10) days old.)
+     - A server is "valid" is it is listed as valid by more than half of the
+       "live" downloaded" network-status document.
+     - A server is "running" if it is listed as running more than half of the
+       "recent" downloaded network-status documents.  (A network status is
+       "recent" if was published in the last 60 minutes.  If there are fewer
+       than 3 such documents, the most recently published 3 are "recent.")
 
    Clients store network status documents so long as they are live.