Upversioned the C source tree to '0.0.7-SNAPSHOT', but proposing to start experimental

work towards 0.1.0 in separate source trees.

src/c/authorise.c

@@ -0,0 +1,24 @@
+/*
+ * authorised.c
+ *
+ * For now, a dummy authorising everything.
+ * 
+ * (c) 2021 Simon Brooke <simon@journeyman.cc>
+ * Licensed under GPL version 2.0, or, at your option, any later version.
+ */
+
+#include "memory/conspage.h"
+#include "memory/consspaceobject.h"
+
+
+/**
+ * TODO: does nothing, yet. What it should do is access a magic value in the
+ * runtime environment and check that it is identical to something on this `acl`
+ */
+struct cons_pointer authorised( struct cons_pointer target,
+                                struct cons_pointer acl ) {
+    if ( nilp( acl ) ) {
+        acl = pointer2cell( target ).access;
+    }
+    return TRUE;
+}