About the shhtpd.exe web server

This project has been developed during many years by Sergey Lyubka. 
Licensing have been changed during the years of development.

Beerware license applies to POW CMS version of shttpd v1.42 from Sourceforge
This means. The user is allowed to do anything with the licensed material. Should the user of the product meet the author and consider the software useful, he is encouraged to buy the author a beer "in return" (or, in some variations, to drink a beer in the author's honor).
The "beerware" license is explained here. https://tldrlegal.com/license/beerware-license

Simple HTTPD Web Server v1.42 - 2008-08-23
Name: shttpd.exe -- lightweight web server
Copyright: Sergey Lyubka - shttpd is licensed under the terms of "beerware" license 
Author: Sergey Lyubka <valenok@gmail.com>
Download: https://sourceforge.net/projects/shttpd/files/shttpd/
Documentation: http://shttpd.sourceforge.net/shttpd.1.txt
Date: 2008-08-23

Project background

2004-2008 - Simple HTTPD - Sourceforge - Beerware license
The Simple HTTPD (shttpd) project was registered on Sourceforge 2004-12-08
The first released of shttpd on Sourceforge with v 1.3 on 2004-12-20 
Changed licence to "beerware" with version. 1.36 on 2006-11-11 
The last version was 1.42 released on 2008-08-23
Project changed name Dec 14, 2008 to Mongoose and project moved to Google Code Archive. License changed to: GNU GPL v2
Sourceforge web page was last updated on: 2013-06-04


2008-2014 - Mongoose - Google Code Archive - GNU GPL v2 licens
http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
Project changed name Dec 14, 2008 to Mongoose and moved to Google Code Archive. License changed to: GNU GPL v2
The code was updated to Mongoose v2.0 on Dec 14, 2008 on Google Code Archive
The last updated to Mongoose v5.1 on Jan 10, 2014 on Google Code Archive with GNU GPL v2 licens
https://code.google.com/archive/p/mongoose/

2014 - present - Cesanta Software Limited - Mongoose - Proprietary License
Free Edition does not support feature that have been included in earlier free versions
Now Pro version costs USD30 and supports following that free version does not.
CGI
SSI (Server Side Includes)
Experimental TLS1.2
PHP
SQLite

Cesanta Software Limited - Mongoose Terms from
End User License Agreement for Mongoose Binary
This End User License Agreement (EULA) is a legal agreement between you (either an individual or a legal entity) and Cesanta Software Limited the Author of the Software product identified above, which includes computer software and may include associated media and “online” or electronic documentation (“SOFTWARE PRODUCT”). By installing, copying, or otherwise using the SOFTWARE PRODUCT, you agree to be bounded by the terms of this EULA. If you do not agree to the terms of this EULA, do not install or use the SOFTWARE PRODUCT.
Software Product License
1. GRANT OF LICENSE.
This EULA grants you the following rights:
Installation and Use.

FREE SOFTWARE PRODUCT - Is for Personal use only. You may install and use an unlimited number of copies. No use for Commercial purposes allowed.

PAID SOFTWARE PRODUCT - Is for Personal and Commercial use. It can only be installed and used on the basis of one license per unique device [a desktop, notebook, netbook, smartphone, tablet or similar computer owned by and in the control of the Licensee].
Reproduction and Distribution.
Cesanta Software Limited prohibits distribution by the third parties for both FREE and PAID software products. Unless the right to commercially distribute is expressly acquired and permitted by the Cesanta Software Limited. In this case the number of distributions is defined by the commercial terms between Cesanta Software Limited and the Licensee and indicated in the Licensee’s personal cabinet on www.cesanta.com. Distribution is considered to be an installation on more than ONE unique device [a desktop, notebook, netbook, smartphone, tablet or similar computer owned by and in the control of the Licensee].
2. DESCRIPTION OF OTHER RIGHTS AND LIMITATIONS.
Limitations on Reverse Engineering, Decompilation, Disassembly and change (add,delete or modify) of the resources in the compiled assembly. You may not reverse engineer, decompile, or disassemble the SOFTWARE PRODUCT, except and only to the extent that such activity is expressly permitted by applicable law notwithstanding this limitation.
Update and Maintenance.
Upgrades for the FREE version of SOFTWARE PRODUCT are FREE of charge. PAID version of the SOFTWARE PRODUCT is eligible for the software updates during one calendar year after the purchase date or until the subscription is terminated. Cesanta Software Limited reserves the right to conduct version distribution tracking for the SOFTWARE PRODUCT.
Separation of Components.
The SOFTWARE PRODUCT is licensed as a single product. Its component parts may not be separated for use on more than one computer.
Software Transfer.
You may not permanently transfer any of your rights under this EULA.
Termination.
Without prejudice to any other rights, the Author of this Software may terminate this EULA if you fail to comply with the terms and conditions of this EULA. In such event, you must destroy all copies of the SOFTWARE PRODUCT and all of its component parts.
3. COPYRIGHT
All title and copyrights in and to the SOFTWARE PRODUCT (including but not limited to any images, photographs, clipart, libraries, and examples incorporated into the SOFTWARE PRODUCT), the accompanying online materials, and any copies of the SOFTWARE PRODUCT are owned by the Author of this Software. The SOFTWARE PRODUCT is protected by copyright laws and international treaty provisions. Therefore, you must treat the SOFTWARE PRODUCT like any other copyrighted material.
Limited Warranty.
NO WARRANTIES. The Author of this Software expressly disclaims any warranty for the SOFTWARE PRODUCT. The SOFTWARE PRODUCT and any related documentation is provided “as is” without warranty of any kind, either express or implied, including, without limitation, the implied warranties or merchantability, fitness for a particular purpose, or noninfringement. The entire risk arising out of use or performance of the SOFTWARE PRODUCT remains with you.
No Liability For Damages.
In no event shall the Author of this Software be liable for any special, consequential, incidental or indirect damages whatsoever (including, without limitation, damages for loss of business profits, business interruption, loss of business information, or any other pecuniary loss) arising out of the use of or inability to use this product, even if the Author of this Software is aware of the possibility of such damages and known defects. 


But Cesanta has not got the licesning right all the time.

From Mongoose source code dated 2016-02-16
Copyright (c) 2004-2010 Sergey Lyubka

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.


Background of Cecanta

http://bizplus.ie/swapping-google-for-the-startup-slog/

Anatoly Lebedev and Sergey Lyubka left Google to found Cesanta Pictured are Sergey Lyubka (left) and Anatoly Lebedev 09 Feb 2016 | 12.05 pm

Anatoly Lebedev and Sergey Lyubka believe in an Internet-of-Things future. In fact, they believe in IoT so much that they both left jobs in Google to found Cesanta, which was incorporated in 2013.

Lebedev (34), who hails from Russia, and Lyubka (40), originally from Ukraine, have been living in Ireland for years. Lyubka worked as an engineering manager in Google while Lebedev worked on developing AdWords business in in EMEA emerging market countries, including strategic partnerships that involved multimillion dollar deal negotiations.

