Fix libesmtp URL
|Reported by:||Bruce Dubbs||Owned by:||Bruce Dubbs|
The upstream site http://brianstafford.info/libesmtp seems to be gone.
We need to find an alternate and get a better site for currency, although the package has not changed since 2015. We can host on anduin and I did find https://src.fedoraproject.org/repo/pkgs/libesmtp/ but I don't know if we want to use that. The full URL includes an md5sum which is ugly.
libesmtp is only used by balsa as a required dependency.
On the other hand we could drop both libesmtp and balsa...