licenses: Add BUSL-1.1

Business Source License 1.1, text taken from:
https://spdx.org/licenses/BUSL-1.1.html

Bug: https://bugs.gentoo.org/912053
Signed-off-by: Ulrich Müller <ulm@gentoo.org>

licenses/BUSL-1.1

@@ -0,0 +1,76 @@
+Business Source License 1.1
+
+License text copyright © 2017 MariaDB Corporation Ab, All Rights
+Reserved. "Business Source License" is a trademark of MariaDB
+Corporation Ab.
+
+Terms
+
+The Licensor hereby grants you the right to copy, modify, create
+derivative works, redistribute, and make non-production use of the
+Licensed Work. The Licensor may make an Additional Use Grant, above,
+permitting limited production use.
+
+Effective on the Change Date, or the fourth anniversary of the first
+publicly available distribution of a specific version of the Licensed
+Work under this License, whichever comes first, the Licensor hereby
+grants you rights under the terms of the Change License, and the rights
+granted in the paragraph above terminate.
+
+If your use of the Licensed Work does not comply with the requirements
+currently in effect as described in this License, you must purchase a
+commercial license from the Licensor, its affiliated entities, or
+authorized resellers, or you must refrain from using the Licensed Work.
+
+All copies of the original and modified Licensed Work, and derivative
+works of the Licensed Work, are subject to this License. This License
+applies separately for each version of the Licensed Work and the Change
+Date may vary for each version of the Licensed Work released by Licensor.
+
+You must conspicuously display this License on each original or modified
+copy of the Licensed Work. If you receive the Licensed Work in original
+or modified form from a third party, the terms and conditions set forth
+in this License apply to your use of that work.
+
+Any use of the Licensed Work in violation of this License will
+automatically terminate your rights under this License for the current
+and all other versions of the Licensed Work.
+
+This License does not grant you any right in any trademark or logo of
+Licensor or its affiliates (provided that you may use a trademark or
+logo of Licensor as expressly required by this License).
+
+TO THE EXTENT PERMITTED BY APPLICABLE LAW, THE LICENSED WORK IS PROVIDED
+ON AN "AS IS" BASIS. LICENSOR HEREBY DISCLAIMS ALL WARRANTIES AND
+CONDITIONS, EXPRESS OR IMPLIED, INCLUDING (WITHOUT LIMITATION)
+WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
+NON-INFRINGEMENT, AND TITLE.
+
+
+MariaDB hereby grants you permission to use this License's text to
+license your works, and to refer to it using the trademark "Business
+Source License", as long as you comply with the Covenants of Licensor
+below.
+
+Covenants of Licensor
+
+In consideration of the right to use this License's text and the
+"Business Source License" name and trademark, Licensor covenants to
+MariaDB, and to all other recipients of the licensed work to be provided
+by Licensor:
+
+1. To specify as the Change License the GPL Version 2.0 or any later
+   version, or a license that is compatible with GPL Version 2.0 or a
+   later version, where "compatible" means that software provided under
+   the Change License can be included in a program with software
+   provided under GPL Version 2.0 or a later version. Licensor may
+   specify additional Change Licenses without limitation.
+
+2. To either: (a) specify an additional grant of rights to use that
+   does not impose any additional restriction on the right granted in
+   this License, as the Additional Use Grant; or (b) insert the text
+   "None".
+
+3. To specify a Change Date.
+
+4. Not to modify this License in any other way.

metadata/license-mapping.conf

@@ -40,6 +40,7 @@ BSD-2-Clause = BSD-2
 BSD-3-Clause = BSD
 BSD-4-Clause = BSD-4
 BSL-1.0 = Boost-1.0
+BUSL-1.1 = BUSL-1.1
 bzip2-1.0.5 = BZIP2
 bzip2-1.0.6 = BZIP2
 CC-BY-2.0 = CC-BY-2.0