This is because if sites bother to obtain externally signed certificates
for their web server, they're going to use @WWWHOST@ for the name.

of the node_types table. How did I do that?

of the apache config file.

CreateSliver().

The problem is that comit f6d81289
(Changes from Pat Gunn at CMU: allow "at swapout"...) changed the exit
status of parse.proxy with this line:
  -    exec("nice -15 $parser @ARGV $nsfile");
  +    exec("nice -15 $parser @ARGV $nsfile|tee $tempdir/output.txt");
so parse-ns was not detecting that it failed.  It then processed to
run xmlconvert which detected that the ns parse failed.

The causes two problems, 1) my error handling code depends on the fact
that parse.proxy failed in order to determine it was a user error and
2) it causes the "Syntax Check" option to always report correct syntax
even when it shouldn't.

This adds experimental support for experiment visualization.  It
currently is a Utah only features and is thus guarded by the
EXP_VIS_SUPPORT site variable, and also requires some changes to
httpd.conf on ops which are not committed.

The experiment visualization support allows users to create basic
per-experiment or per-project web pages by putting an index.html file
in /proj/PROJ/www/exp-vis/EXP, or /proj/PROJ/www/group-vis.  The web
pages can then be accessed via the "(User) Visualization" tab in the
experient or project web page or directly via
https://users.emulab.net/exp-vis/PROJ/EXP, or /proj-vis/PROJ.  A proxy
is used so that only project members can access the web page.  Some
support for per-group vis. is also provided (use
/group-vis/PROJ/GROUP).

exp. vis. is an experimental feature.

Use tbssh instead of ssh, call TBScriptUnlock(), and check that we
really are root when running the proxy on ops.

exp. visualization code.

Also now depends on HTTP::Date found in the p5-libwww package.

  write-vis-auth-boss -> write-vis-auth
  write-vis-auth-ops -> write-vis-auth.proxy

more than one instance from running at once and 2) can run in the
background by mailing testbed-ops on error.

Add script that, when run from the root of the repository, returns the
sha1 hash of the current branch head.  It writes the hash to stdout if
successful or returning non-zero otherwise.  The three methods used to
get the hash are as follows:

1. Try using the git tools.  This is the preferred method since the
   layout of the .git directory may change (not likely to happen soon,
   but it did change a few years ago).
2. Failing that, assume the current (1.7.x) repository layout and try
   to extract the value of HEAD.
3. If there is no .git directory, try extracting the hash from the
   VERSION file in the top-level directory of the tree.

Also add the VERSION file and set the export-subst attribute for it.

notion that the wires table holds links to the switch always as node2.
Also remove the hardwired "ethernet" forwarding protocol, and instead
get that from the forwarding_protocols attribute of the switch type.

Now we can insert switch links at multiple layers so that assign can
map onto either.

of desire to 64 chars.