Stop resolver scripts from signalling "not found".

This triggers a bug in radsecproxy.  Don't use it for now.

tools/naptr-eduroam.sh

@@ -70,4 +70,4 @@ if [ -n "${SERVERS}" ]; then
     exit 0
 fi
 
-exit 10				# No server found.
+exit 0

tools/radsec-dynsrv.sh

@@ -48,4 +48,4 @@ if test -n "${SERVERS}" ; then
         exit 0
 fi
 
-exit 10				# No server found.
+exit 0