Packages with the rfc3195 use flag

app-admin / rsyslog : An enhanced multi-threaded syslogd with database support and more

  • Build the rfc3195 input module (requires dev-libs/liblogging)

dev-libs / liblogging : Liblogging is an easy to use, portable, open source library for system logging

  • Enables RFC 3195 protocol (aka syslog-reliable) support. If you don't know what this is, you don't need it!