Make the rc.conf(5) 'log_in_vain' knob an integer.

Try this out in -CURRENT, MFC, and then consider dropping the
'log_in_vain' knob all together. It really is something for
sysctl.conf(5).

PR:		bin/32953
Reviewed by:	-bugs discussion
MFC after:	1 week

1 files changed, 15 insertions, 6 deletions

diff --git a/share/man/man5/rc.conf.5 b/share/man/man5/rc.conf.5
index 0ec51d9..ee9b1b3 100644
--- a/share/man/man5/rc.conf.5
+++ b/share/man/man5/rc.conf.5
@@ -503,12 +503,19 @@ or other weird behavior.
 Some network devices are known
 to be broken with respect to these options.
 .It Va log_in_vain
-.Pq Vt bool
-Set to
-.Dq NO
-by default.
-Setting to YES will enable logging of connection attempts to ports that
-have no listening socket on them.
+.Pq Vt int
+Set to 0 by default.
+The
+.Xr sysctl 8
+variables,
+.Sy net.inet.tcp.log_in_vain
+and
+.Sy net.inet.udp.log_in_vain
+as described in
+.Xr tcp 4
+and
+.Xr udp 4 ,
+are set to the given value.
 .It Va tcp_keepalive
 .Pq Vt bool
 Set to
@@ -1876,6 +1883,8 @@ Flags for
 .Xr info 1 ,
 .Xr makewhatis 1 ,
 .Xr vidcontrol 1 ,
+.Xr tcp 4 ,
+.Xr udp 4 ,
 .Xr exports 5 ,
 .Xr motd 5 ,
 .Xr accton 8 ,