v2.12-rc2: Read configuration string from environment variables

This release adds the option to load configuration string from the environment variables. You can read more about it on this page: https://github.com/Cryptolens/license-server#alternative-ways-to-configure-the-server.

This means that all features of the license server are supported by only using the binaries. There no longer a need to compile the license server if you would like to use the local floating license server.

Note: you need to re-create the configuration string again on this page, in case you generated one for previous versions of the license server.