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).

update system

of the apache config file.

exp. vis. is an experimental feature.

I added a sig handler to reopen the log file. See corresponding changes
to doc/UPDATING and to install/boss-install.in

directories are now placed in a project subdirectory, to avoid
blowing out the max number of subdirs (32K in FreeBSD). Dirs are
now called $pid/$eid/$idx.

new certificate format.

in the protogeni code. We no longer save the unencrypted certs after
they are revoked, since protogeni will ignore them. I redid the the
DB table as well, adding a revoked stamp, and the DN so that we can
generate the CRL list from the DB directly, without having to run them
all through openssl.

This commit requires all certs to be regenerated, and the ssl xmlrpc
server to be restarted.

database is only used for Utah's emulab.  In the process many other
changes where made to dumperrorlog to fix bugs and make it more
correct/robust.  I also avoided the need to explicitly lock any tables.