sysutils/rsyslog8: Mark broken

The upgrade to 8.2310.0 has resulted in a non-working version which
floods the log file with hundreds of messages and consumes all
available memory:

Oct 15 16:00:54 BSDHelmut rsyslogd[29360] imuxsock: recvfrom UNIX: Socket operation on non-socket [v8.2310.0]

Other reports show rsyslog attempting to use Linux /proc which also
fails.

Mark broken temporarily pending a response from upstream..

See https://github.com/rsyslog/rsyslog/issues/5241

PR: 274509
Reported by: Helmut Ritter