Bug found by: Miljenko

Bug found by:	Miljenko
Submitted by:
Requested by:
Reviewed by:
Approved by:
Obtained from:

After moving a ng_iface interface to another vimage, "touch" it by
doing a no-op ifconfig on it.  This was an old hack that allowed
the kernel to rename the corresponding netgraph node, so we need this
for running IMUNES with kernels older then Nov 23 2006, when the
renaming problem was fixed in the kernel.

In effect this and previous commit by Miljenko back out revision
1.36 of exec.tcl.