bin/55344: rc.conf(5) should allow to pass flags to npfd(8)

[jruohonen%iki.fi@localhost]

>Number:         55344
>Category:       bin
>Synopsis:       rc.conf(5) should allow to pass flags to npfd(8)
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jun 04 12:40:00 +0000 2020
>Originator:     Jukka Ruohonen
>Release:        9.0
>Organization:
-
>Environment:
-
>Description:
Like for most daemons, there should be an option "npfd_flags" in rc.conf(5) in order to pass flags to the packet logger.
>How-To-Repeat:

>Fix:
Write the few lines required...