Fixing tut related compile errors on etch:

(1) the LLLand class had to be forward declared in a cpp file that did not include llland.h
(2) ensure_equals(const char*, type, type) requires that type have an operator!=(type, type) defined.
(3) ensure_equals(const char*, type, type) is so overloaded that the compiler can have trouble picking the right version when it has to implicitly cast a std::string to "const char*" AND multiple valid casts exist for type --> S32, F32, etc.  To solve this problem we must explicitly pass in a "const char*" instead of a std::string.
Reviewed with CG

indra/llcommon/lldate.cpp

@@ -234,6 +234,11 @@ void LLDate::secondsSinceEpoch(F64 seconds)
 	mSecondsSinceEpoch = seconds;
 }
 
+bool operator!=(const LLDate& first, const LLDate& second)
+{
+	return (first.secondsSinceEpoch() != second.secondsSinceEpoch());
+}
+
 std::ostream& operator<<(std::ostream& s, const LLDate& date)
 {
 	date.toStream(s);

indra/llcommon/lldate.h

@@ -116,6 +116,8 @@ private:
 	F64 mSecondsSinceEpoch;
 };
 
+// this operator required for tut
+bool operator!=(const LLDate& first, const LLDate& second);
 
 // Helper function to stream out a date
 std::ostream& operator<<(std::ostream& s, const LLDate& date);

indra/llcommon/lluri.cpp

@@ -599,3 +599,8 @@ std::string LLURI::mapToQueryString(const LLSD& queryMap)
 	}
 	return query_string;
 }
+
+bool operator!=(const LLURI& first, const LLURI& second)
+{
+	return (first.asString() != second.asString());
+}

indra/llcommon/lluri.h

@@ -187,4 +187,7 @@ private:
 	std::string mEscapedQuery;
 };
 
+// this operator required for tut
+bool operator!=(const LLURI& first, const LLURI& second);
+
 #endif // LL_LLURI_H

indra/test/lltut.cpp

@@ -124,7 +124,7 @@ namespace tut
 				{
 					ensure_equals(msg + " map keys", 
 						actual_iter->first, expected_iter->first);
-					ensure_equals(msg + "[" + actual_iter->first + "]",
+					ensure_equals((msg + "[" + actual_iter->first + "]").c_str(),
 						actual_iter->second, expected_iter->second);
 					++actual_iter;
 					++expected_iter;
@@ -137,7 +137,7 @@ namespace tut
 				
 				for(int i = 0; i < actual.size(); ++i)
 				{
-					ensure_equals(msg + llformat("[%d]", i),
+					ensure_equals((msg + llformat("[%d]", i)).c_str(),
 						actual[i], expected[i]);
 				}
 				return;