Futurize future_standard_library: copy_reg to copyreg
Futurize future_standard_library: copy_reg to copyreg

http://python-future.org/compatible_idioms.html?#copy-reg-copyreg
Signed-off-by: Dan Yeaw <2591e5f46f28d303f9dc027d475a5c60d8dea17a@yeaw.me>

amolenaar/gaphas