Resurrect io testconnection executable

...which appears to be the only code that exercises osl's socket (rather than
named pipe) connections, so lets have that available at least for manual
execution.

Addresses various compiler and loplugin warnings, and extends a wait time to
more reliably have the MyThread instance already accept when the second accept
(on the main thread) is done.

Change-Id: I761d747b08ab45f1ac03dad8b4197fae63228e16
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/116103
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

0 files changed, 0 insertions, 0 deletions