Log message

refactoring: enforce encapsulation of field AbstractConnectionThread.username by
making it private.
The method setUsername() already existed, but it had not been used a single
time.

	Modify	/trunk/api/src/org/jogre/client/ClientConnectionThread.java	diff
	Modify	/trunk/api/src/org/jogre/common/AbstractConnectionThread.java	diff
	Modify	/trunk/server/src/org/jogre/server/ServerConnectionThread.java	diff
	Modify	/trunk/server/src/org/jogre/server/administrator/AdminClientConnectionThread.java	diff