wwup.cgi - HTTP uploader

Example usage:

    curl \
      --form 'payload-type=osh-runtime' \
      --form 'subdir=git-123' \
      --form 'file1=@myfile.wwz' \
      $URL

    curl \
      --form 'payload-type=github-jobs' \
      --form 'subdir=1234' \
      --form 'file1=@benchmarks.wwz' \
      --form 'file2=@benchmarks.tsv' \
      --form 'file3=@benchmarks.json' \
      $URL

    curl \
      --form 'run-hook=soil-event-job-done' \
      --form 'arg1=foo' \
      --form 'arg2=bar' \
      $URL