added a caveat to FQDN section

diff --git a/OPTIONS b/OPTIONS
index 41b42734566613abaf540672c5f31aac797df1e6..1c93f274ee32938e9259f0171326fe889048475b 100644 (file)
--- a/OPTIONS
+++ b/OPTIONS
@@ -5,6 +5,9 @@ FQDN
     file.  Ie: instead of myhost you would use myhost.mydomain.edu.
     Beware that turning FQDN on requires sudo to make DNS lookups which
     may make sudo unusable if your DNS is totally hosed.
+    Also note that you must use the host's official name as DNS knows it.
+    That is, you may not use a host alias (CNAME entry) due to performance
+    issues and the fact that there is no way to get all aliases from DNS.
     This is off by default.
 
 LOGGING