WEB_SOCKET example may be wrong linker flag

[RoyBellingan]

Would you mind to drop a line that is possible that instead of doing for the build
clang++ -o example example.cpp -l restbed -l ssl -l crypt
You should use crypto (with o at the end)
so
clang++ -o example example.cpp -l restbed -l ssl -l crypto

Done on opensuse tumbleweed, both with gcc10/11 & clang13 using as linker ld.bfg ld.gold and mold https://github.com/rui314/mold