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Jsi License

Jsi source is covered by the following MIT license:

The MIT License (MIT)

Copyright (c) 2013 Peter MacDonald

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

Libwebsockets

Jsi links agains Libwebockets, which is covered by LGPL with an extra clause allowing static linking.

Libwebsockets and included programs are provided under the terms of the GNU
Library General Public License (LGPL) 2.1, with the following exceptions:

1) Static linking of programs with the libwebsockets library does not
constitute a derivative work and does not require the author to provide
source code for the program, use the shared libwebsockets libraries, or
link their program against a user-supplied version of libwebsockets.

If you link the program to a modified version of libwebsockets, then the
changes to libwebsockets must be provided under the terms of the LGPL in
sections 1, 2, and 4.

2) You do not have to provide a copy of the libwebsockets license with
programs that are linked to the libwebsockets library, nor do you have to
identify the libwebsockets license in your program or documentation as
required by section 6 of the LGPL.

However, programs must still identify their use of libwebsockets. The
following example statement can be included in user documentation to
satisfy this requirement:

"[program] is based in part on the work of the libwebsockets  project
(http://libwebsockets.org)"

                  GNU LESSER GENERAL PUBLIC LICENSE
                       Version 2.1, February 1999
...

Note this seems to to say that as long as libwebsockets is not modified, all that is required is an acknowledgement in your user documentation.

Others

Other software including sqlite, miniz, jsmn, regex from musl, etc are either public domain, BSD or MIT compatible.