wip/system-tools-backends 2.10.2nb1 NetBSD

The System Tools Backends (s-t-b for short) are a set of cross-platform modules for Linux, FreeBSD and other Unix systems. The backends provide a common DBus interface to all platforms to modify or read the system configuration in a distro independent fashion. Historically, access to system configuration has varied deeply across Unix flavours, and concreting a bit more, across Linux distributions, making it near impossible to write desktop tools that could work flawlessly in a cross-platform way. System Tools Backends try to fill this gap, offering a generic and easy way for desktop applications to read and modify configuration details.