mmap call.
* configure.in (os=freebsd*|bsdi*): Set base_os=unix/bsd/bsd4.4
for these too.
* sysdeps/unix/sysv/tcsetattr.c: Use |= instead of = to properly
set c_oflag value.
* Makeconfig [! objpfx] (csu-objpfx): Add trailing slash.
* locale/Makefile (categories): Uncomment collate.
* locale/lc-collate.c: New file.
