docs-xml/manpages/smbclient.1.xml: fix case of -T flag in example.

Signed-off-by: Aurélien Aptel <aurelien.aptel@gmail.com>
Reviewed-by: David Disseldorp <ddiss@samba.org>

Autobuild-User(master): David Disseldorp <ddiss@samba.org>
Autobuild-Date(master): Fri Jun 28 17:45:31 CEST 2013 on sn-devel-104