Device details such as model, designation, manufacturer and pretty name
are needed by low level system daemons. The SSU D-Bus interface can't be
used early in the boot and libssu is a Qt C++ library - which makes it
difficult to use from scripts / daemons written in in plain C.
Provide libssusysinfo that duplicates some logic in libssu and makes it
possible to query device details without requiring D-Bus IPC or Qt code.
Provide ssusysinfo command line utility that can be used to query the
information from script files.
The intent is that the library and associated binaries can be used both
from open source and proprietary components - thus all new code is
licensed under LGPL v2.1.
Code dealing with ini-file handling is taken from "profiled" tree and
uses separate (BSD) license, see lib/inifile.[ch] and lib/symtab.[ch].
Signed-off-by: Simo Piiroinen <firstname.lastname@example.org>