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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 88a87fad 2021-03-24 rsc Copyright © 2021 Plan 9 Foundation

 2 e6c837d6 2009-07-15 rsc Portions Copyright © 2001-2008 Russ Cox

 3 e6c837d6 2009-07-15 rsc Portions Copyright © 2008-2009 Google Inc.

 4 e6c837d6 2009-07-15 rsc 

 5 88a87fad 2021-03-24 rsc Permission is hereby granted, free of charge, to any person obtaining

 6 88a87fad 2021-03-24 rsc a copy of this software and associated documentation files (the

 7 88a87fad 2021-03-24 rsc "Software"), to deal in the Software without restriction, including

 8 88a87fad 2021-03-24 rsc without limitation the rights to use, copy, modify, merge, publish,

 9 88a87fad 2021-03-24 rsc distribute, sublicense, and/or sell copies of the Software, and to

10 88a87fad 2021-03-24 rsc permit persons to whom the Software is furnished to do so, subject to

11 88a87fad 2021-03-24 rsc the following conditions:

12 e6c837d6 2009-07-15 rsc 

13 88a87fad 2021-03-24 rsc The above copyright notice and this permission notice shall be

14 88a87fad 2021-03-24 rsc included in all copies or substantial portions of the Software.

15 00b80edb 2003-10-11 devnull 

16 88a87fad 2021-03-24 rsc THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

17 88a87fad 2021-03-24 rsc EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

18 88a87fad 2021-03-24 rsc MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

19 88a87fad 2021-03-24 rsc IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

20 88a87fad 2021-03-24 rsc CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

21 88a87fad 2021-03-24 rsc TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

22 88a87fad 2021-03-24 rsc SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

23 00b80edb 2003-10-11 devnull 

24 00b80edb 2003-10-11 devnull ===================================================================

25 00b80edb 2003-10-11 devnull 

26 88a87fad 2021-03-24 rsc This software is derived from Plan 9, originally copyright Lucent Technologies

27 88a87fad 2021-03-24 rsc and distributed under the Lucent Public License, Version 1.02.

28 88a87fad 2021-03-24 rsc Lucent was bought by Alcatel, which was bought by Nokia.

29 88a87fad 2021-03-24 rsc On March 23, 2021, Nokia announced the transfer of the Plan 9 copyrights to the

30 88a87fad 2021-03-24 rsc Plan 9 Foundation, which in turn relicensed Plan 9 under the the MIT license,

31 88a87fad 2021-03-24 rsc reproduced above.

32 00b80edb 2003-10-11 devnull 

33 88a87fad 2021-03-24 rsc There are a few exceptions, noted with LICENSE files in their own directories:

34 00b80edb 2003-10-11 devnull 

35 88a87fad 2021-03-24 rsc The bzip2 program uses the bzip2 license; see src/cmd/bzip2/LICENSE.

36 00b80edb 2003-10-11 devnull 

37 88a87fad 2021-03-24 rsc The fonts from Bigelow and Holmes were licensed only for Plan 9 itself,

38 88a87fad 2021-03-24 rsc not for derivatives like Plan 9 from User Space.

39 00b80edb 2003-10-11 devnull 

40 88a87fad 2021-03-24 rsc Plan 9 from User Space arranged a separate agreement with B&H to include

41 88a87fad 2021-03-24 rsc the bitmap fonts in the font/luc, font/lucm, font/lucsans, and font/pelm

42 88a87fad 2021-03-24 rsc directories. Other bitmap fonts have other licenses. See font/LICENSE.

43 00b80edb 2003-10-11 devnull 

44 88a87fad 2021-03-24 rsc The Lucida Sans Unicode PostScript fonts were licensed from B&H only for Plan 9

45 88a87fad 2021-03-24 rsc itself, not derivatives like Plan 9 from User Space. In their place, Plan 9 from

46 88a87fad 2021-03-24 rsc User Space provides Luxi Sans, also by B&H but available under a more liberal

47 88a87fad 2021-03-24 rsc license, and Deja Vu, a Unicode extension of the Bitstream Vera family of fonts.

48 88a87fad 2021-03-24 rsc Luxi Sans is similar to Lucida Sans, but it has no Unicode support.

49 88a87fad 2021-03-24 rsc Deja Vu does have good Unicode support.