fix auto upgrade

acme.sh

@@ -3612,7 +3612,7 @@ if [ "$INSTALLONLINE" ] ; then
 fi
 
 
-[ -z "$1" ] && showhelp && exit
+[ -z "$1" ] && showhelp
 
 
 if _startswith "$1" '-' ; then _process "$@" ; else "$@"; fi ; exit