The syslog5424 module sends an access line in the format RFC 5424 asks for:
version, RFC 3339 timestamp, hostname, app name, process id, message id and
structured data.  The destination is parsed by nginx's own syslog code, so
server, facility, severity and tag mean what they mean in access_log, and
the value of a variable is escaped where the text around it is not.

This port only installs the module sources.  The module itself is built by
the nginx ports when their SYSLOG5424 option is enabled.
