Add a -p switch to dhclient. The switch tells dhclient to persist

despite the interface link status.

Add dhclient_flags_iface and background_dhclient_iface rc.conf options.
(where iface is a specific interface).  These can be used to give
interface specific flags to dhclient.

Reviewed by:	brooks@

1 files changed, 12 insertions, 0 deletions

diff --git a/share/man/man5/rc.conf.5 b/share/man/man5/rc.conf.5
index 55b5b00..524d64d 100644
--- a/share/man/man5/rc.conf.5
+++ b/share/man/man5/rc.conf.5
@@ -356,6 +356,12 @@ For the
 DHCP client, see the
 .Xr dhclient 8
 manpage for a description of the command line options available.
+.It Va dhclient_flags_ Ns Va iface
+Additional flags to pass to the DHCP client program running on
+.Va iface
+only.
+When specified, this variable overrides
+.Va dhclient_flags .
 .It Va background_dhclient
 .Pq Vt bool
 Set to
@@ -364,6 +370,12 @@ to start the DHCP client in background.
 This can cause trouble with applications depending on
 a working network, but it will provide a faster startup
 in many cases.
+.It Va background_dhclient_ Ns Va iface
+When specified, this variable overrides the
+.Va background_dhclient
+variable for interface
+.Va iface
+only.
 .It Va synchronous_dhclient
 .Pq Bt bool
 Set to