MFC r335059 to stable/11 brought a regression: now syslogd in default RFC 3164 mode drops incoming messages it cannot parse. Previously, it accepted it and wrote as-is.
Running syslogd in debug mode gives errors such as:
Invalid PRI from 10.45.64.237
For logs from Cisco SCE8000:
107: 01:15:21: %USER-6-SESSION_ACCEPTED: CPU#000 A Telnet session from X.X.X.X was established.
108: 01:15:21: %USER-6-SESSION_STARTED_TRAP: CPU#000 Telnet session started from X.X.X.X
Please unbreak it making the following configuration work again: