jail.8: Mention that vnet.interface can have multiple addresses

The vnet.interface parameter allows defining multiple interfaces,
separated by commas. Mention this in the man page.
While here, fix some other style nits that mandoc complained about.

PR:			206353
Approved by:		ziaee
Differential Revision:	https://reviews.freebsd.org/D52965

usr.sbin/jail/jail.8

@@ -23,7 +23,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd September 15, 2025
+.Dd October 8, 2025
 .Dt JAIL 8
 .Os
 .Sh NAME
@@ -705,8 +705,8 @@ The super-user is enabled by default.
 Allow privileged processes in the jail to manipulate filesystem extended
 attributes in the system namespace.
 .It Va allow.adjtime
-Allow privileged processes in the jail to slowly adjusting global operating system
-time.
+Allow privileged processes in the jail to slowly adjusting global operating
+system time.
 For example through utilities like
 .Xr ntpd 8 .
 .It Va allow.settime
@@ -1009,7 +1009,7 @@ jail is removed.
 .It Va ip4.addr
 In addition to the IP addresses that are passed to the kernel, an
 interface, netmask and additional parameters (as supported by
-.Xr ifconfig 8 Ns )
+.Xr ifconfig 8 )
 may also be specified, in the form
 .Dq Ar interface Ns | Ns Ar ip-address Ns / Ns Ar netmask param ... .
 If an interface is given before the IP address, an alias for the address
@@ -1023,11 +1023,12 @@ adding the IP alias.
 .It Va ip6.addr
 In addition to the IP addresses that are passed to the kernel,
 an interface, prefix and additional parameters (as supported by
-.Xr ifconfig 8 Ns )
+.Xr ifconfig 8 )
 may also be specified, in the form
 .Dq Ar interface Ns | Ns Ar ip-address Ns / Ns Ar prefix param ... .
 .It Va vnet.interface
-A list of network interfaces to give to a vnet-enabled jail after is it created.
+A comma separated list of network interfaces to give to a vnet-enabled jail
+after is it created.
 The interfaces will automatically be released when the jail is removed.
 .It Va zfs.dataset
 A list of ZFS datasets to be attached to the jail.