librefuse: Add to support fuse_session, set_signal_handler and fuse_daemonize. required by exfat - Free exFAT file system implementation (https://code.google.com/p/exfat/)
bug-fix and improve per-user tmpdir.

- create root's /tmp on start-up. if /private/tmp is empty like enabled clean_tmp or /private/tmp is tmpfs, some daemons can not create temporary files on start-up.
- create user's /tmp on start-up.
kiconv - in-kernel iconv and POSIX wide-character handling interface.
Add ursu(4) driver for Realtek RTL8188SU/RTL8191SU. WIP
NetBSD/evbarm (uARM)