Provide server package for debuginfod

Currently the debuginfod package contains a man page for debuginfod.service (/usr/share/man/man8/debuginfod.service.8.gz), but no package provides the actual service file mentioned. The man page also points to non-exist /etc/sysconfig/debuginfod config file.

It would be useful for third-party repositories as well as downstream distributions to provide debuginfod service via a packaged debuginfod server package.