Merge remote-tracking branch 'origin/topic/matthias/opaque'

* origin/topic/matthias/opaque:
  Add new unit test for opaque serialization.
  Migrate entropy testing to opaque.
  C++ify RandTest.*
  Fix a hard-to-spot bug.
  Use more descriptive error message.
  Fix the fix :-/.
  Fix initialization of hash values.
  Be clearer about delegation.
  Implement serialization of opaque types.
  Update hash BiF documentation.
  Migrate free SHA* functions to SHA*Val::digest().
  Add missing type name that caused failing tests.
  Update base scripts and unit tests.
  Simplify hash function BiFs.
  Add support for opaque hash values.
  Adapt BiF & Bro parser to handle opaque types.
  More lexer/parser work.
  Implement equivalence relation for opaque types.
  Support basic serialization of opaque.
  Add opaque type to lexer, parser, and BroType.

Closes #925

Conflicts:
	aux/broccoli

src/Type.h

@@ -29,6 +29,7 @@ typedef enum {
 	TYPE_LIST,
 	TYPE_FUNC,
 	TYPE_FILE,
+	TYPE_OPAQUE,
 	TYPE_VECTOR,
 	TYPE_TYPE,
 	TYPE_ERROR
@@ -499,6 +500,23 @@ protected:
 	BroType* yield;
 };
 
+class OpaqueType : public BroType {
+public:
+	OpaqueType(const string& name);
+	virtual ~OpaqueType() { };
+
+	const string& Name() const { return name; }
+
+	void Describe(ODesc* d) const;
+
+protected:
+	OpaqueType() { }
+
+	DECLARE_SERIAL(OpaqueType)
+
+	string name;
+};
+
 class EnumType : public BroType {
 public:
 	EnumType(const string& arg_name);