r18939: don't rely on the umask being right in ldb creation. Both Samba3 and

r18939: don't rely on the umask being right in ldb creation. Both Samba3 and
Samba4 smbd force the umask to 0, which meant we ended up with ldb
being world writable.

This isn't really an ideal fix, as it means ldb no longer honors umask
(as it should do, like all good libraries).

Unfortunately the 'proper' fix is too complex for now

this also merges a tiny code style fix from s4 to s3