Use a better summary

ez-ipupdate/ez-ipupdate.spec

@@ -25,7 +25,7 @@
 
 #   package information
 Name:         ez-ipupdate
-Summary:      Updating host name for many dynamic DNS services
+Summary:      Assistant to dynamic DNS services
 URL:          http://www.gusnet.cx/proj/ez-ipupdate/
 Vendor:       Angus Mackay
 Packager:     The OpenPKG Project