Xvnc (via the xorg sources) needs SHA-1 routines and it can grab these from many different libraries. The default is OpenSSL, and that's what we're currently using.
nettle is however a much smaller and cleaner option when you just want one of the crypto algorithms. And we already have nettle in the build environment. So we should look at switching over.
Patch applied now. Tested text rendering, as that is what the server uses the crypto for. Could not see any issues.
Tested Xvnc from build thinlinc-vnc-server-4.9.0post-6045.x86_65. It contains nettle strings, but no OpenSSL strings like before. Works good.