Fix shebang

cause perl needs a regular shebang even when evoking the script
directly with perl

Makefile.am

@@ -27,7 +27,7 @@ CLEANFILES =
 # Command that replaces substitution variables with their values.
 subst = sed \
 	-e 's|@PACKAGE_VERSION[@]|$(PACKAGE_VERSION)|g' \
-	-e 's|@PERL[@]|$(PERL)|g' \
+	-e '1 s|^\#\!.*perl$$|\#\!$(PERL)|g' \
 	-e 's|@localstatedir[@]|$(localstatedir)|g' \
 	-e 's|@runstatedir[@]|$(runstatedir)|g' \
 	-e 's|@sysconfdir[@]|$(sysconfdir)|g'

ddclient.template

@@ -1,4 +1,4 @@
-#!@PERL@
+#!/usr/bin/perl
 ######################################################################
 #
 # DDCLIENT - a Perl client for updating DynDNS information