docs: Fix typos.

This is a follow-up patch for bug #10134 - Samba 4.0 is stricter in checking
acls for "open for execution".

Signed-off-by: Karolin Seeger <kseeger@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>

Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Thu Sep 12 11:59:56 CEST 2013 on sn-devel-104
tdb: Fix some typos in comments.

Thanks to Stewart A. Levin for reporting.

fixes bug #10136 (Documentation typos).

Signed-off-by: Bjoern Jacke <bj@sernet.de>
Reviewed-by: Karolin Seeger <kseeger@samba.org>

Autobuild-User(master): Karolin Seeger <kseeger@samba.org>
Autobuild-Date(master): Thu Sep 12 13:54:41 CEST 2013 on sn-devel-104