ZyXEL Communications NSA 210 User Manual page 570

Appendix E Open Source Licences
The MIT/X derivate license practically allows you to do almost anything with
the sources, on the condition that the copyright texts in the sources are
left intact.
6.6 Can you please change the curl/libcurl license to XXXX?
No.
We have carefully picked this license after years of development and
discussions and a large amount of people have contributed with source code
knowing that this is the license we use. This license puts the restrictions
we want on curl/libcurl and it does not spread to other programs or
libraries that use it. It should be possible for everyone to use libcurl or
curl in their projects, no matter what license they already have in use.
6.7 What are my obligations when using libcurl in my commercial apps?
Next to none. All you need to adhere to is the MIT-style license (stated in
the COPYING file) which basically says you have to include the copyright
notice in "all copies" and that you may not use the copyright holder's name
when promoting your software.
You do not have to release any of your source code.
You do not have to reveal or make public any changes to the libcurl source
code.
You do not have to reveal or make public that you are using libcurl within
your app.
As can be seen here: http://curl.haxx.se/docs/companies.html and
elsewhere, more and more companies are discovering the power
of libcurl and take advantage of it even in commercial environments.
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