the obligatory undo-a-change-before release commit

I had constified struct vmod_blobdigest_digest just before release,
which does not work. I have not understood why this did not show up as a
compile error before.

src/tus_blob.c

@@ -149,15 +149,15 @@ tus_checksums(void)
  */
 
 struct tus_chksum {
-	unsigned				magic;
-#define VMOD_TUS_CHKSUM_MAGIC			0x105c6650
-	const struct vmod_blobdigest_digest	*digest;
-	VCL_BLOB				expect;
-	VCL_BLOB				final;
+	unsigned			magic;
+#define VMOD_TUS_CHKSUM_MAGIC		0x105c6650
+	struct vmod_blobdigest_digest	*digest;
+	VCL_BLOB			expect;
+	VCL_BLOB			final;
 };
 
 /* tus hash names to blobdiget object */
-const struct vmod_blobdigest_digest *
+struct vmod_blobdigest_digest *
 tus_hash(const char *s, size_t l)
 {
 	if (enabled == 0 || s == NULL)
@@ -173,7 +173,7 @@ tus_hash(const char *s, size_t l)
 }
 
 struct tus_chksum *
-tus_chksum_new(VRT_CTX, const struct vmod_blobdigest_digest *d)
+tus_chksum_new(VRT_CTX, struct vmod_blobdigest_digest *d)
 {
 	struct tus_chksum *r;
 
@@ -193,7 +193,7 @@ tus_chksum_new(VRT_CTX, const struct vmod_blobdigest_digest *d)
 struct tus_chksum *
 tus_chksum_hdr(VRT_CTX, const char *hdr)
 {
-	const struct vmod_blobdigest_digest *d;
+	struct vmod_blobdigest_digest *d;
 	struct tus_chksum *r;
 	VCL_BLOB expect;
 	const char *sep;

src/tus_blob.h

 int tus_chksum_init(VRT_CTX);
 int tus_chksum_fini(VRT_CTX);
-const struct vmod_blobdigest_digest *tus_hash(const char *, size_t);
-struct tus_chksum *tus_chksum_new(VRT_CTX,
-    const struct vmod_blobdigest_digest *);
+struct vmod_blobdigest_digest *tus_hash(const char *, size_t);
+struct tus_chksum *tus_chksum_new(VRT_CTX, struct vmod_blobdigest_digest *);
 struct tus_chksum *tus_chksum_hdr(VRT_CTX, const char *);
 void tus_chksum_update(VRT_CTX, struct tus_chksum *c,
     const void *ptr, size_t l);

src/tus_file.c

@@ -246,7 +246,7 @@ VCL_BLOB
 tus_concat_hash(VRT_CTX, const struct VPFX(tus_server) *srv,
     const struct tus_concat *concat)
 {
-	const struct vmod_blobdigest_digest *d;
+	struct vmod_blobdigest_digest *d;
 	struct tus_chksum *c;
 	struct tus_file_core *part;
 	unsigned i;

src/tus_server.h

@@ -16,6 +16,6 @@ VCL_DURATION tus_server_expires(const struct VPFX(tus_server) *);
 void tus_server_lock(struct VPFX(tus_server) *);
 void tus_server_unlock(struct VPFX(tus_server) *);
 VCL_BYTES tus_server_max(const struct VPFX(tus_server) *s);
-const struct vmod_blobdigest_digest * tus_server_digest(
+struct vmod_blobdigest_digest * tus_server_digest(
     const struct VPFX(tus_server) *s);
 struct tus_exp *tus_server_exp(const struct VPFX(tus_server) *);

src/tus_servers.c

@@ -76,7 +76,7 @@ tus_server_max(const struct VPFX(tus_server) *s)
 	return (s->max);
 }
 
-const struct vmod_blobdigest_digest *
+struct vmod_blobdigest_digest *
 tus_server_digest(const struct VPFX(tus_server) *s)
 {
 	CHECK_OBJ_NOTNULL(s, VMOD_TUS_SERVER_MAGIC);

src/tus_servers.h

@@ -24,7 +24,7 @@ struct VPFX(tus_server) {
 	VCL_DURATION				expires;
 	int					basefd;
 	struct tus_files			files[1];
-	const struct vmod_blobdigest_digest	*digest;
+	struct vmod_blobdigest_digest		*digest;
 	struct tus_exp				*exp;
 };
 

src/vmod_tus.c

@@ -206,7 +206,7 @@ VCL_VOID
 tus_server__init(VRT_CTX, struct VPFX(tus_server) **tussrvp,
     const char *vcl_name, struct VARGS(server__init) *args)
 {
-	const struct vmod_blobdigest_digest *d = NULL;
+	struct vmod_blobdigest_digest *d = NULL;
 	struct VPFX(tus_server) *tussrv, needle[1];
 
 	AN(tussrvp);