runtests.pl: support attribute "nonewline" in part verify/upload.

    # if this section exists, we verify upload

    my @upload = getpart("verify", "upload");

    if(@upload) {

      my %hash = getpartattr("verify", "upload");

      if($hash{'nonewline'}) {

          # cut off the final newline from the final line of the upload data

          chomp($upload[$#upload]);

      }

    }

    # if this section exists, it might be FTP server instructions:

    my @ftpservercmd = getpart("reply", "servercmd");