Needed when boss is the tip server (i.e., for IPMI consoles).

Somehow this vaguely feels like a potential flaw. Prior to this,
a misconfigured sshtb command that specified boss would fail.
Now it will succeed and run in the one place it can cause the
most damage.

Also, fix a couple of nits in the console code.

This commit is intended to makes the license status of Emulab and
ProtoGENI source files more clear.  It replaces license symbols like
"EMULAB-COPYRIGHT" and "GENIPUBLIC-COPYRIGHT" with {{{ }}}-delimited
blocks that contain actual license statements.

This change was driven by the fact that today, most people acquire and
track Emulab and ProtoGENI sources via git.

Before the Emulab source code was kept in git, the Flux Research Group
at the University of Utah would roll distributions by making tar
files.  As part of that process, the Flux Group would replace the
license symbols in the source files with actual license statements.

When the Flux Group moved to git, people outside of the group started
to see the source files with the "unexpanded" symbols.  This meant
that people acquired source files without actual license statements in
them.  All the relevant files had Utah *copyright* statements in them,
but without the expanded *license* statements, the licensing status of
the source files was unclear.

This commit is intended to clear up that confusion.

Most Utah-copyrighted files in the Emulab source tree are distributed
under the terms of the Affero GNU General Public License, version 3
(AGPLv3).

Most Utah-copyrighted files related to ProtoGENI are distributed under
the terms of the GENI Public License, which is a BSD-like open-source
license.

Some Utah-copyrighted files in the Emulab source tree are distributed
under the terms of the GNU Lesser General Public License, version 2.1
(LGPL).

there is no .pid file.  It was printing:
        Insecure dependency in kill while running with -T switch
        at /usr/testbed/sbin/console_setup.proxy line 130

Capserver and capture now handshake the owner/group of the tipline.
Owner is defaults to root, and the group defaults to root when the
node is not allocated. Capture will do the chmod after the handshake,
so if boss is down when capture starts, the acl/run file will get 0,0,
but will get the proper owner/group later after its able to handshake.
As a result, console_setup.proxy was trimmed down and cleaned up a
bit, since it no longer has to muck with some of this stuff.

A second change was to support multiple tiplines per node. I have
modified the tiplines table as such:

	| Field   | Type        | Null | Key | Default | Extra |
	+---------+-------------+------+-----+---------+-------+
	| tipname | varchar(32) |      | PRI |         |       |
	| node_id | varchar(10) |      |     |         |       |
	| server  | varchar(64) |      |     |         |       |

That is, the name of the tip device (given to capture) is the unique
key, and there can be multiple tiplines associated with each node.
console_setup now uses the tiplines table to determine what tiplines
need to be reset; used to be just the name of the node_id passed into
console_setup. Conversely, capserver uses the tipname to map back to
the node_id, so that it can get the owner/group from the reserved
table.

I also removed the shark hack from nalloc, nfree, and console_reset,
since there is no longer any need for that; this can be described
completely now with tiplines table entries. If we ever bring the
sharks back, we will need to generate new entries. Hah!

is actually used anymore.
Added a "generic" entry to /etc/remote so that we do not need tip
entries for each node; they all look the same anyway.
Change tip to lookup up generic /etc/remote entry, just to make
tip happy. The acl file comes from the tiplogs directory, as
set in the header file.

plastic. Useful for when plastic reboots, although it needs to be
run from paper of course. We should probably set up some kind of
reboot utility for when plastic reboots, since when capture fires up,
the "acl" files are all in the wrong group/mode. On the other hand,
this shared file based permission scheme is going to end up changing
anyway soon, since it won't work when the serial lines are on other
machines. Will need a tip permserver at that point.

of pty/tty based (since they have several annoying problems
associated). Note that permission is granted via the use of an "acl"
file; /dev/tip/machine.acl, which must be set to the group of the
project the node is in, so the user can read out the process id number
and the random bits that are used by capture to grant permission to
use (tip sends the random bits across first thing). This handshake is
due to change to a request/challenge scheme as described by Dave in
email to the testbed list.

list of nodes for console_setup to avoid an ssh per node. Change the
sleep(1) in console_setup.proxy to a select(,,,0.25). Looks to be
about .25 seconds per node now, plus a constant time of 1.5 seconds.

the testbed list.

mode so no one can open it between the time capture does the revocation
and we change the group/mode to the new user.

script runs out of nalloc and nfree and figures out what project (group)
a node is in. It does an ssh over to plastic to run the other script
that does the actual work.