hs: Stub link_specifier_t in hs_descriptor.h

Avoid including a huge trunnel interface everytime we include hs_descriptor.h

Signed-off-by: David Goulet <dgoulet@torproject.org>

src/or/hs_descriptor.c

@@ -55,11 +55,10 @@
 /* For unit tests.*/
 #define HS_DESCRIPTOR_PRIVATE
 
-#include "hs_descriptor.h"
-
 #include "or.h"
-#include "circuitbuild.h"
 #include "ed25519_cert.h" /* Trunnel interface. */
+#include "hs_descriptor.h"
+#include "circuitbuild.h"
 #include "parsecommon.h"
 #include "rendcache.h"
 #include "hs_cache.h"

src/or/hs_descriptor.h

@@ -19,7 +19,7 @@
 #include "torcert.h"
 
 /* Trunnel */
-#include "ed25519_cert.h"
+struct link_specifier_t;
 
 /* The earliest descriptor format version we support. */
 #define HS_DESC_SUPPORTED_FORMAT_VERSION_MIN 3