and libraries. Rough, needs plenty more work.

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* state...

I think this fixes flyspray bug #51.

     www/editsitevars.php3 - The reworked PHP page, including
       a SetSiteVar function bridging to the script via XML.
     backend/{editsitevars,GNUmakefile}.in configure configure.in - New backend script.
     sql/database-fill.sql - Add table_regex 'sitevariables' checking patterns.

     www/newmmlist.php3 - The reworked PHP page.
     backend/{newmmlist,GNUmakefile}.in configure configure.in - New backend script.
     sql/database-fill.sql - Add table_regex 'mailman_lists' checking patterns.

form processing to be done.

The gist is that I have moved all of the data checking and DB work to
the backend into a new script called utils/newosid. This script does
all the field checking that used to be done in php. It takes a simple
XML file as input and returns a set of strings to format as errors (if
there are any).

The overall goal to make a big push to move this code out of PHP and
perl.  A nice side effect is that many operations that are current
only available via the web interface will also become available
command line (and also XMLRPC with a little moew work).