Rework internal module registration to happen in constructors.

src/modules/keyboard/Keyboard.h

@@ -533,9 +533,6 @@ public:
 
 	virtual ~Keyboard() {}
 
-	// Implements Module.
-	virtual ModuleType getModuleType() const { return M_KEYBOARD; }
-
 	/**
 	 * Sets whether repeat keypress events should be sent if a key is held down.
 	 * Does not affect text input events.
@@ -614,6 +611,10 @@ public:
 	static bool getConstant(const char *in, ModifierKey &out);
 	static bool getConstant(ModifierKey in, const char *&out);
 
+protected:
+
+	Keyboard(const char *name);
+
 private:
 
 	static StringMap<Key, KEY_MAX_ENUM>::Entry keyEntries[];