Below are changes in the packaging method
- Use tarball provided by the upstream project maintainer instead of
cloning the whole git-repo
- Drop openssl variant as it was deprecated then removed by the
upstream project
- Add dependency on libev, libsodium, libudns as they are not bundled
with the source code anymore
Addresses issue #4191
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>