tdb: allow tdb_open_ex() with O_RDONLY of TDB_FEATURE_FLAG_MUTEX tdbs.

Bug: https://bugzilla.samba.org/show_bug.cgi?id=10781

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
tdb_wrap: Make mutexes easier to use

This patch makes sure we work fine and open without mutexes if they
are not supported.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
lib/ldb-samba: add ldif handler for msDS-TrustForestTrustInfo

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>
s3:libsmb: fix some function header comments.

Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>

Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Thu Nov 20 18:45:28 CET 2014 on sn-devel-104