allow installations under 5.21.6 without waiting for aliased.pm
defer evaluating expressions for log_debug
log_debug the URLs we are hitting, and the response (if small)
cpanidx is down; switch to cpanmetadb
Dist-Zilla-Plugin-PromptIfStale-0.032

          - better way of avoiding warnings in perl 5.21.6, while still
            allowing this dist to install
          - switch from cpanidx to cpanmetadb index