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all: update for new MIT license On March 23, 2021, Nokia transferred the copyrights in the Plan 9 software to the Plan 9 Foundation, which relicensed them under the MIT license. This commit updates the Plan 9 from User Space license to reflect the new base license. The vast majority of the contributions beyond the base Plan 9 set were by me, many of them explicitly under an MIT license. Those are all under the new MIT license now as well. The port of mk to Unix was taken from Inferno via Vita Nuova and had been made available under GPL, but Vita Nuova has relicensed Inferno under the MIT license as well, to match the new Plan 9 license. Michael Teichgraber contributed src/lib9/zoneinfo.c explicitly under the Lucent Public License but has agreed to change the contribution to the MIT license now used in the rest of the distribution. There remain a few exceptions, most notably fonts. See the root LICENSE file for full details. The only mention of the Lucent Public License in the whole tree now is in the LICENSE file, explaining the history.
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1 This is a Unix port of the Plan 9 build tool mk, by Andrew Hume.

2 Please send comments about the packaging to Russ Cox <rsc@swtch.com>.

4 Copyright © 2021 Plan 9 Foundation

5 Portions Copyright © 1997-1999 Vita Nuova Limited

6 Portions Copyright © 2000-2015 Vita Nuova Holdings Limited

8 Permission is hereby granted, free of charge, to any person obtaining a copy

9 of this software and associated documentation files (the "Software"), to deal

10 in the Software without restriction, including without limitation the rights

11 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

12 copies of the Software, and to permit persons to whom the Software is

13 furnished to do so, subject to the following conditions:

15 The above copyright notice and this permission notice shall be included in

16 all copies or substantial portions of the Software.

18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

20 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE

21 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

22 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

23 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

24 THE SOFTWARE.