StringIO::multicommunicate can now only handle up to 100 messages.
Should be sufficient.
Change-Id: Id3ccdf03143b80a37aa0ef0b87c47090ef802a42
Reviewed-on: https://forge.frm2.tum.de/review/16288
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Tested-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>