license: Change hatohol license from GPLv2 to GPLv3 with exception/LGPLv3.

We change hatohol license from GPLv2 to GPLv3 with exception,
and LGPLv3.
- To accept maximum collaborators.
- To allow (indirect) linkage with OpenSSL via MariaDB.

Following files are released under LGPLv3:
	server/common/*
	server/hap/Hap*
	server/hap/Hatohol*
	server/mlpl/src/*
	server/src/*.h
	server/tools/hatohol-def-src-file-generator.cc

Other source files are released under GPLv3 with "OpenSSL exception":
	Additional permission under GNU GPL version 3 section 7

	If you modify this program, or any covered work, by linking or
	combining it with the OpenSSL project's OpenSSL library (or a
	modified version of that library), containing parts covered by the
	terms of the OpenSSL or SSLeay licenses, Project Hatohol
	grants you additional permission to convey the resulting work.
	Corresponding Source for a non-source form of such a combination
	shall include the source code for the parts of OpenSSL used as well
	as that of the covered work.

Signed-off-by: YOSHIFUJI Hideaki <hideaki.yoshifuji@miraclelinux.com>
Signed-off-by: YOSHIFUJI Hideaki <hideaki@yoshifuji.org>