If you are planning on using Icecast through SSL/TLS you will likely find it won't work. This is because Icecast is not compiled with SSL support. You will need to compile it yourself.
We do not think this is an option as it would require permission for each and every one who ever contributed to Icecast. Beside that the list is long it's not complete and sometimes there are no ways to contact those people.
Official git repo: https://gitlab.xiph.org/xiph/icecast-server
./configure --with-curl --with-openssl