A small improvement to the DEBUG message when pass-through authentication
fails with ACCESS_DENIED. Increased it to log level 1 so it will print out
and pointed to Restrict NTLM as the setting so people know what to look for.

Signed-off-by: Richard Sharpe <rsharpe@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>

Autobuild-User(master): Richard Sharpe <sharpe@samba.org>
Autobuild-Date(master): Sun Oct 11 06:28:05 CEST 2015 on sn-devel-104
