Log Message:
Update to 4.0.2:

--- 4.0.2 2010/03/09

wrbuf_destroy allows NULL WRBUF passed to it.

Fix CCL qualifier aliases (did not work since YAZ 2.1.56).

Add ZOOM_connection_close.

No fixed size buffers for ZOOM shell - bug #3257.

tstodr: make it work on s390 platform.

New icu iterator-functions. The new icu_iter-functions makes it possible
to use ICU chains from many threads.

yaz-client: better syntax check for show command.