Fix to only calc stats for active sites

Old/moved sites may still have access.log files, so the update-awstats script
now filters the list to only include sites whose access.log was modified in the
last month.

update-awstats

@@ -27,7 +27,7 @@ ENDCONFIG
  fi
 }
 
-for LOG in $HOME/logs/*/http{,s}/access.log
+for LOG in $(find $HOME/logs/*/http{s,}/access.log -mtime -31)
 do
  [[ "$LOG" =~ logs/(.+)/(http|https) ]]
  SITE=${BASH_REMATCH[1]}