Documenation updates for --bridge-interface and "off-link".

man/dnsmasq.8

@@ -833,7 +833,7 @@ and
 for details.)
 
 For IPv6, the mode may be some combination of
-.B ra-only, slaac, ra-names, ra-stateless, ra-advrouter.
+.B ra-only, slaac, ra-names, ra-stateless, ra-advrouter, off-link.
 
 .B ra-only
 tells dnsmasq to offer Router Advertisement only on this subnet,
@@ -873,6 +873,9 @@ enables a mode where router address(es) rather than prefix(es) are included in t
 This is described in RFC-3775 section 7.2 and is used in mobile IPv6. In this mode the interval option
 is also included, as described in RFC-3775 section 7.3.
 
+.B off-link
+tells dnsmasq to advertise the prefix without the on-link (aka L) bit set.
+
 .TP
 .B \-G, --dhcp-host=[<hwaddr>][,id:<client_id>|*][,set:<tag>][,<ipaddr>][,<hostname>][,<lease_time>][,ignore]
 Specify per host parameters for the DHCP server. This allows a machine
@@ -1597,11 +1600,13 @@ option also forces the leasechange script to be called on changes
 to the client-id and lease length and expiry time.
 .TP
 .B --bridge-interface=<interface>,<alias>[,<alias>]
-Treat DHCP request packets arriving at any of the <alias> interfaces
-as if they had arrived at <interface>. This option is necessary when
-using "old style" bridging on BSD platforms, since
-packets arrive at tap interfaces which don't have an IP address.
-A trailing '*' wildcard can be used in each <alias>.
+Treat DHCP (v4 and v6) request and IPv6 Router Solicit packets
+arriving at any of the <alias> interfaces as if they had arrived at
+<interface>.  This option allows dnsmasq to provide DHCP and RA
+service over unaddressed and unbridged Ethernet interfaces, e.g. on an
+OpenStack compute host where each such interface is a TAP interface to
+a VM, or as in "old style bridging" on BSD platforms.  A trailing '*'
+wildcard can be used in each <alias>.
 .TP
 .B \-s, --domain=<domain>[,<address range>[,local]]
 Specifies DNS domains for the DHCP server. Domains may be be given