Note the existence of module-specific jail paramters, starting with the

linux.* parameters when linux emulation is loaded.

MFC after:	5 days

usr.sbin/jail/jail.8

@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd July 20, 2015
+.Dd April 25, 2016
 .Dt JAIL 8
 .Os
 .Sh NAME
@@ -610,6 +610,32 @@ have not had jail functionality added to them.
 .El
 .El
 .Pp
+Kernel modules may add their own parameters, which only exist when the
+module is loaded.
+These are typically headed under a parameter named after the module,
+with values of
+.Dq inherit
+to give the jail full use of the module,
+.Dq new
+to encapsulate the jail in some module-specific way,
+and
+.Dq disable
+to make the module unavailable to the jail.
+There also may be other parameters to define jail behavior within the module.
+Module-specific parameters include:
+.Bl -tag -width indent
+.It Va linux
+Determine how a jail's Linux emulation environment appears.
+A value of
+.Dq inherit
+will keep the same environment, and
+.Dq new
+will give the jail it's own environment (still originally inherited when
+the jail is created).
+.It Va linux.osname , linux.osrelease , linux.oss_version
+The Linux OS name, OS release, and OSS version associated with this jail.
+.El
+.Pp
 There are pseudo-parameters that are not passed to the kernel, but are
 used by
 .Nm