do the actual parse. The parser now spits out XML instead of DB
queries, and the wrapper on boss converts that to DB insertions after
verification. There are some makefile changes as well to install the
new parser on ops via NFS, since otherwise the parser could
intolerably out of date on ops!

experiments created in groups and experiments created in the main
project. Too easy for the queries to get out of sync, and the
advantage is minor anyway.

turns out that getting iterators to the STL hash_* data structures is
really slow, so for some that won't be very big, use the non-hash
version.

Buys something like a 30% speedup for large topologies.

The conversion from XML to an experiment representation updates the
DB, although the experiment has to exist, and only certain fields can
be updated. For the rest of the virtual toplogy, the old toplogy is
deleted, and the new one installed. Use with caution. This is intended
to be hooked to the parser, and later to the vis tool.

fixed the trivial_link problem for Lans.
Add an option to ptopgen that says to include the various virtnode
related things, so as not to slow down assign in the general case
that virtnodes are not being used.

LAN nodes are no longer treated specially. Instead, I've introduced
the idea of 'static' types (old-style types retroactively become
'dynamic' types). While a pnode can only satisfy one dynamic type at a
time, it can always satisfy its static types (assuming it has enough
capacity left.) Static types are flagged by prepending them with a '*'
in the ptop file. So, for example, you may give switches the
'*lan:10000' type so that they can satisfy virtual LAN nodes. Of
course, other pnodes can have this type too, so that we can get
'trivial LANs'.

Actually, removing special treatment for LANs cleans up a lot of code.
However, it may have some negative impacts on solutions, since we're
not as smart about where to place LAN nodes as we used to be (they get
annealed along with everything else, and not migrated.) I haven't seen
any evidence of this yet, however.

This leaves us with a single type of special pnode, a switch.

Also added a new bit of syntax in ptop files - when '*' is given as a
the maxiumum load for a type, the node is allowed to take on an
infinite (well, actually, just a really big number of) vnodes of that
type.

ptopgen was modified to always report switches as being capable of
hosting LANs, and assign_wrapper now understands direct links to LANs,
which is what we get when the LAN is hosted directly on a switch.

Fixed a bug in scoring direct links, in which the penatly was being
added once when a direct link was mapped, but subtracted only once
when it was freed.

Added a '-T' option for doing simple self-testing. When adding a node
to the solution, assign records the score, adds the node, removes it
again, and checks to make sure that the resulting score is the same as
the original score. The usefulness of this feature in debugging
scoring problems cannot be understated...

can run the parser on it.

has the 'view' statement necessary for the jail virtual IPs.

120 + (30 * number_of_vnodes).

Now, an agent connect statement can come before application attach-agent
which complies with NS. In addition, the order of
"$ns attach-agent <node> <agent>" and "$ns connect <agent1> <agent2>"
can by anything now. Reversing the order in NS causes problems for this though.
However, in emulab's case, we don't need that order. Most of these checks
are now moved to updatedb reducing some clutter in traffic.tcl

One thing that NS supports and it would be difficult for us is the order
of application attach-agent and "$ns at" statements. In NS, its ok to
flip the order. In emulab, its still not. Thats coz "$ns at" statements
need to know what vnode is the event going to. Of course, this can be
fixed by making "$ns at" storing the eventstring as is and only parsing
during the updatedb/$ns run phase. Seems like its not worth changing now.

plain text of just the NS file. The "NS File:" subheader in the
showexp page is now a hyperlink to it.

1. From the "Thank you DOS for all your stupid limits" department
   we have an enhancement to the -I option to ignore a slice.
   The slice number can be followed by a BSD partition letter
   (e.g., "-I1g") to ignore a BSD partition within a slice.
   Ditto for the -R options which forces raw compression.

2. From the "Gee, I shoulda taken that grinding noise more seriously"
   department we have the -X option to force imagezip to try e(X)tremely
   hard (yeah, yeah, its the only letter I could come up with) to read
   the data off the disk, even faking (zero) data if a read fails after
   10 tries.

get Insufficient Nodes errors

easier to chain back through the swapmod incarnations of an experiment,
without going through query hell, and is very useful in summary stats
page for calculating the usage across swapmods.

Note that the lastrsrc field of the experiments table can now go.

some independant functionality off into new files, and reduce its
use of globals, which can be very confusing to follow.

I didn't get as far as I had hoped, but it's a good start.

jailed nodes with their own IP ...

various defs files to reflect mini/main difference.

only be called after we're done with _all_ handles. So, add a simple
count of how many handles we've given out, and only call cleanup on
the last one to get unregistered.

 * usewatunnels - Allow users to turn off widearea tunnels.
 * multiplex_factor - Allow user to specify vnode multiplex factor.
 * trivial_ok - Allow user to specify collocation okay for link.

More work on the veth interface support and trivial link stuff.
Appears to be operational and passes the test suite.