Implement Utility::NewUUID().

Fixes #3589

lib/base/i2-base.h

@@ -131,6 +131,9 @@ using std::type_info;
 #include <boost/lexical_cast.hpp>
 #include <boost/foreach.hpp>
 #include <boost/tuple/tuple.hpp>
+#include <boost/uuid/uuid.hpp>
+#include <boost/uuid/uuid_generators.hpp>
+#include <boost/uuid/uuid_io.hpp>
 
 using boost::shared_ptr;
 using boost::weak_ptr;

lib/base/utility.cpp

@@ -373,3 +373,19 @@ Utility::LoadIcingaLibrary(const String& library, bool module)
 
 	return hModule;
 }
+
+/**
+ * Generates a new UUID.
+ *
+ * @returns The new UUID in text form.
+ */
+String Utility::NewUUID(void)
+{
+	boost::uuids::uuid uuid = boost::uuids::random_generator()();
+
+	stringstream us;
+	us << uuid;
+
+	return us.str();
+}
+

lib/base/utility.h

@@ -53,6 +53,8 @@ public:
 
 	static void Sleep(double timeout);
 
+	static String NewUUID(void);
+
 	static
 #ifdef _WIN32
 	HMODULE