winbind3: Fix an invalid free

This fixes a warning I've never seen before :-)

../source3/winbindd/winbindd_cm.c:781:59: warning: attempt to free a non-heap object ‘machine_krb5_principal’ [-Wfree-nonheap-object]

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>

Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Wed Aug 14 14:04:16 CEST 2013 on sn-devel-104
smbd: Fix async echo handler forking (Bug 10086)

If SMB3 is chosen via an SMB1 negprot, we forked the echo handler because
set_Protocol is called later, after the full protocol negotiation is done.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org

Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Wed Aug 14 15:54:43 CEST 2013 on sn-devel-104
Followup patch for BUG: https://bugzilla.samba.org/show_bug.cgi?id=10082

Thanks to Jim Brown <jim.brown@rsmas.miami.edu>

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Volker Lendecke <Volker.Lendecke@SerNet.DE>
Reviewed-by: Jeremy Allison <jra@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Aug 15 03:46:20 CEST 2013 on sn-devel-104