Add geni-fetch-aggmon cron entry to doc

Author: tcmitchell

doc/geni-portal.texi

@@ -296,7 +296,7 @@ once a day) to synchronize all groups and accounts.
 @pindex geni-fetch-aggmon
 Aggregate status information is displayed on the GENI portal. This
 information is retrieved from other GENI servers and cached locally
-for display. This crontab entry fetches the information and writes it
+for display. These crontab entries fetch the information and write it
 to the configured @code{sysconfdir}, probably @code{/etc/geni-ch}.
 
 @emph{N.B. The entry below must appear on a single line, without the
@@ -308,6 +308,9 @@ in this document}
 0 */1 * * * /usr/local/sbin/geni-fetch-amdown \
         /usr/share/geni-ch/portal/portal-cert.pem \
         /usr/share/geni-ch/portal/portal-key.pem
+#
+# Fetch aggregate data hourly from GENI Monitoring
+0 */1 * * * /usr/local/sbin/geni-fetch-aggmon
 @end example
 
 @section Log files