GitLab

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).

Lots of minor stuff, interfaces, command line arguments (cleaned up documentation), global rspec attributes, minor node attributes, location tags, bugfixes, etc.

Basic framework is in place. Availability and printability is codified into
functions now. Node.pm modified so that lookups can be done in bulk for
efficiency. When making XML, we now create XML trees rather than printing
out XML fragments.

executed in order they appear in the XML. Output and status files are
stored /var/tmp/startup-NN.{log,status} for each statement, where NN
is just its ordinal location in the element. There is also an overall
log; /var/tmp/startup.log

Updated example stitching request.

URNs in component_ids should now always refer to the physical node rather than the virtual container.

Added GetNodeByVirtualId, GetLinkByVirtualId, and ReplaceNode as utility functions for managing rspecs.

toString() that says how to indent the string. Very useful for
printing debugging output. Defaults to 0 (no formating).

We have this incorrect namespace in a bunch of our test script rspecs.