Add missing `os.h` include to `utmp.c` to pull in the required `utmp.h` header. Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Signed-off-by: Etienne CHAMPETIER <etienne.champetier@free.fr>