Add comment about additional LGPL-2.0 to LGPL-2.1 grant by waba

Consent was stated in private mail. The conversation is stored in the
sysadmin internal long term archive for relicense approvals.

relicensecheck.pl

@@ -322,7 +322,7 @@ my %old_license_table_2 = (
     'vkrause'       => ['gplv23', 'lgplv23', 'gplv2+', 'lgplv2+', '+eV' ],
     'vonreth'       => ['gplv23', 'lgplv23', 'gplv2+', 'lgplv2+', '+eV' ],
     'vrusu'         => ['gplv23', 'lgplv23', 'gplv2+', 'lgplv2+', '+eV' ],
-    'waba'          => ['gplv23', 'lgplv23',                      '+eV' ],
+    'waba'          => ['gplv23', 'lgplv23',                      '+eV' ], # NOTE: explicit consent given for relicensing LGPL-2.0-only to LGPL-2.1-only in addition to the stated grants
     'wheeler'       => ['gplv23', 'lgplv23', 'gplv2+', 'lgplv2+'        ],
     'whiting'       => ['gplv23', 'lgplv23', 'gplv2+', 'lgplv2+', '+eV' ],
     'willy'         => ['gplv23', 'lgplv23', 'gplv2+', 'lgplv2+', '+eV' ],