OpenBSD syslogd(8) escapes binary data with vis(3). Use the
VIS_NOSLASH option to avoid additional backslashes. Although this
option prevents to decode binaries, it makes automatic post processing
easier. Formats like JSON use backslash escaping themself, additional
escaping from syslogd would break SIEM systems. vis protection was
introduced to avoid evil characters in log files and not to make
binary logging possible.
from Matthias Pitzl; OK deraadt@

Rework how fstat and ktrace pattern are specified in the test
arguments. Add tests to check wether syslogd privsep works. This
is done for debug and foreground and daemon mode. Fstat is checked
for chroot and sockets. Ktrace dump is grepped for setting uid and
gid.

Make syslogd tests more reliable. Allow a range of certain log
messages, in case some got lost. Slow down client when sending
multiple log messages. Sort patterns when checking log files. TLS
error messages have changed, adapt tests.

Add syslogd tests for dropped messages.

Test that long syslog messages are truncated correctly.

Rework how fstat and ktrace pattern are specified in the test
arguments. Add tests to check wether syslogd privsep works. This
is done for debug and foreground and daemon mode. Fstat is checked
for chroot and sockets. Ktrace dump is grepped for setting uid and
gid.

Make syslogd tests more reliable. Allow a range of certain log
messages, in case some got lost. Slow down client when sending
multiple log messages. Sort patterns when checking log files. TLS
error messages have changed, adapt tests.

Add syslogd tests for dropped messages.

Test that long syslog messages are truncated correctly.