doc/conf: Allow hyperlinking to python stdlib
doc/conf: Allow hyperlinking to python stdlib

This is useful for references stdlib modules like `tarfile`.

zerovm/zpm,zerovm/zpm,zerovm/zerovm-cli,zerovm/zerovm-cli,zerovm/zpm,zerovm/zerovm-cli,zerovm/zpm,zerovm/zpm,zerovm/zpm,zerovm/zerovm-cli,zerovm/zerovm-cli,zerovm/zerovm-cli