selinux_file_context renamed set_selinux_file_context. * lib/protoypes.h, libmisc/copydir.c, src/useradd.c: Added reset_selinux_file_context. * src/useradd.c: Check the return value of set_selinux_file_context and reset_selinux_file_context. * libmisc/copydir.c: Check the return value of reset_selinux_file_context.