Message truncated; 96220 bytes received but buffer size is 75370

Link: https://github.com/GeneAssembly/biosal/issues/611
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
rename notification to handshake

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>