2. Introduce new private API calls, fb__shutdown() and fb__shutdown_callback().
3. Introduce fb_smp_server - binary to run superclassic on posix.
4. Various cleanups.
ThreadData.cpp - thread control class to use in Client
thd.cpp - thread control class to use in Server
To avoid making global visibility of a lot of THD_* ISC_event and so functions in libfbclient.so
(Can be breakable but needed)