both nontransparent and octetcounting use RFC5424 which isn't used by
many devices, i.e. OpenWrt or Ubiquiti routers.

Add a new function called NewParserRFC3164 to both.

Signed-off-by: Paul Spooren <[email protected]>

…c3164-openbsd

Regenerate rfc3164/machine.go

OpenBSD like many other hardware sends syslog messages without hostname,
here I added support of such messages.

Some old syslog may add LF between two messages, outside of counters.

This, it added missed WithMaxMessageLength into .rl

It is qutie confusing when it parses a message but returns error as
well, that it was mallforemd.

So, I've used the best effort flag as the way to decide. When it true,
it gnores all errors, but when it false it ignores the message.

Move changes to nontransparent/parser.go.rl and regenerate nontransparent/parser.go

Unifi thinks that it can be up to 48 characters, tolerate it.