[6.0] a87ebb065 constify storage ident

[Dridi Boukelmoune]

commit a87ebb06507c8a61e9235c82c658f42205f16b32
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Sat May 5 10:11:08 2018 +0200

    constify storage ident

diff --git a/bin/varnishd/storage/storage.h b/bin/varnishd/storage/storage.h
index 08f23c9af..212142ceb 100644
--- a/bin/varnishd/storage/storage.h
+++ b/bin/varnishd/storage/storage.h
@@ -119,8 +119,8 @@ struct stevedore {
 	void			*priv;
 
 	VTAILQ_ENTRY(stevedore)	list;
-	char			*ident;
-	char			*vclname;
+	const char		*ident;
+	const char		*vclname;
 };
 
 extern struct stevedore *stv_transient;