librcl: Add stub for clReleaseEvent()

Signed-off-by: Pawel Dziepak <pdziepak@quarnos.org>
librcl: Do not send more than 32kB of data in one UDP datagram

Signed-off-by: Pawel Dziepak <pdziepak@quarnos.org>
librcl: Show names of param_name constants in debug output

Signed-off-by: Pawel Dziepak <pdziepak@quarnos.org>