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+This tool includes 3 statically-linked libraries:
+     - OpenSSL cryptographic library
+     - Vmime "C++ class library for working with RFC-822 and MIME messages"
+       (basically email stuff)
+     - Iniparser library for parsing of .ini configuration files
+
+In addition, the binary contains statically-linked bits of code,
+that GCC (Mingw-w64) adds to binaries.
+
+* OpenSSL
+  We're using a version of this library from before its relicense to
+  Apache 2.0 finalized. License info can be found in openssl-1.1.0h/LICENSE.
+
+  Library's website: https://www.openssl.org/
+
+* Vmime
+  This is a GPLv3-licensed library with exception for OpenSSL. License info
+  can be found in vmime-master/COPYING and vmime-master/COPYING.OpenSSL.
+
+  Library's website: https://www.vmime.org/
+
+* Iniparser
+  Small, MIT-licensed C library. License text can be found
+  in iniparser-4.1/LICENSE. Additionally, many modifications were
+  applied, that are GPLv3-compatible (and in fact, public domain).
+
+  Library's source repository: https://github.com/ndevilla/iniparser/
+
+* LibGCC & friends
+  I don't know details of what runtime bits GCC links in, but there are
+  definitely some. I don't think any of the licenses requires me to provide
+  sources for those, but nevertheless - the entire toolchain (hence also its
+  runtime libraries) can be found in Debian:
+
+      https://packages.debian.org/buster/g++-mingw-w64
+
+  It also has links to sources on the right side of every page, under the
+  "Download Source Package" text. I actually used Devuan to build programs,
+  but it seems to be using the same Mingw-x64 packages, so it doesn't matter.
+
+* My code
+  Copyright (C) 2021 Wojtek Kosior, dual licensed under either:
+       - GNU GPL, version 3 or (at Your option) any later version
+       	 (license text in LICENSES/GPLv3.txt)
+       - 0BSD (license text in LICENSES/0BSD.txt)
+  My code is that in project's topmost directory + some big modifications
+  in Iniparser and a small ugly modification in Vmime.