Today I finally decided to work out this element of our task list. We are happy that now MyServer can be distributed under the GPLv3 terms license without any exception. Previously we were using OpenSSL for the HTTPS protocol, it was giving us some licensing troubles as we needed to add an exception to the original GPLv3 license.
The task was quite straightforward, GNU TLS is offering a nice abstraction layer on the OpenSSL APIs, only few functionalities were not present but it was easy to remove these incompabitilities.
For those interested to test it, the updated source code is available on the subversion repository.