There is still a problem in heavily-test.

const QByteArray & type paras, will cause lift cycle problems. using Value-pass instead.
----
QString, QByteArray supports ref-count and auto-delete , also, these classes support
least-copying, deep-copy will only take place, when the data is about to be changed.
so, in singnals and slots, using QString, QByteArray instead of const QString & and const QByteArray & ,
will not cause performance problem.

Each server instance knows exactly how many clients each server currently have.

branch "SMARTLINK" is continous be ok for smartlink project

This svr 2 svr network using zoomPipeline techniques, an Multi-Threads、pipelined dealer.

The former client focus on heavy-payload test, this one focus on function-test.

Add national-ts files.

Start database develop

set how many thread will be created for ssl trans, how many for plain trans,
client use ssl can communicate with plain client as well

connections Established  between node 2 node. however, p2p can only take effect when both of them logged on a same server-process

Add an method to cancel all tasks belonging to the closing-client, avoiding bad pointer operation in different thread.

operations in task line. adding event-loop based task thread pool.

We need some real application to combine them together.