- Drop POD patch, fixed in 1.67
- Fix source URL to refer to current upstream maintainer
- Escape macro used in changelog (#1527541)
- Drop legacy Group: and BuildRoot: tags
- Drop %defattr, redundant since rpm 4.4
- Use %license where possible
- Drop redundant buildroot cleaning
- Don't need to remove empty directories from the buildroot
- Simplify find command using -delete
- Specify all build dependencies
- Make %files list more explicit
None of these changes break compatibility with EPEL-6, the oldest
currently-supported target.