Spec clean-up
    
    - Clean up spec file for modern rpmbuild:
      - Drop BuildRoot definition
      - Drop %defattr
      - Drop %clean section
      - Drop cleaning of buildroot in %install
      - Use DESTDIR rather than PERL_INSTALL_ROOT
      - Use %{_fixperms} macro rather than our own chmod incantation
      - Don't use macros for commands
    - Break build dependency loop by only using perl(Test::Pod) if we're not
      bootstrapping
    - BR: perl(Test::More)