[rfpkg/el8] (5 commits) ...Rebuild for python-3.8

Summary of changes: b17af39... Patch F30 to use python3 (*) 0950819... Add requires and Buildrequires python3-future (*) 435b206... Fix python2 shebang in python3 build (*) 7d80e7e... Fix --dist/--release option for 'master' %dist detection (*) e04bd8f... Rebuild for python-3.8 (*) (*) This commit already existed in another branch; no separate mail sent