DRTVWR-530 Mac buildfix: changed the license to opensource

scripts/metrics/slp_conv.py

@@ -7,10 +7,28 @@
         by the Viewer into an comma separated value (CSV) file
         for import into spreadsheets and other data analytics tools.
 
-$LicenseInfo:firstyear=2018&license=internal$
-Copyright (c) 2018, Linden Research, Inc.
+$LicenseInfo:firstyear=2021&license=viewerlgpl$
+Second Life Viewer Source Code
+Copyright (C) 2021, Linden Research, Inc.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation;
+version 2.1 of the License only.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 $/LicenseInfo$
 """
+
 from llbase import llsd
 import argparse