in the sliver so that os_setup does not wait until timeout.  Also some
bug fixes and cleanup all through start/wait for sliver.

Probably still not complete, but closer.

update file in each of the sql and install update dirs.

Try to use as much memory as we can for frisbee's buffers.  The amount
we try to allocate is based on the amount of installed memory, so it
will vary from system to system.

Got comparison backwards when checking file date against
HTTP_IF_MODIFIED_SINCE in fetch-vis.

new code. Note that this commit implements only the frontend part.

set n1 [$ns node]
set n2 [$ns node]
set n3 [$ns node]

set seg1 [$ns duplex-link $n1 $n2 * 0ms DropTail]
set seg2 [$ns duplex-link $n2 $n3 * 0ms DropTail]
tb-set-link-layer $seg1 1
tb-set-link-layer $seg2 1

set mypath [$ns make-path "seg1 seg2"]

set link0 [$ns duplex-link $n1 $n3 * 0ms DropTail]
$link0 implemented_by $mypath

node testing.

Also stub in the subnode support; should work as well as it did in the
original version of os_setup, since subnodes were always ignored.

removing a SA from the ClearingHouse.

fail when the pool_daemon did a swapmod of the shared node experiment.

I think we can do this for all remote and virtual nodes, but need
to ponder that a bit more.