Guohaiqing

Results 2 issues of Guohaiqing

### Bug report: When client downloads new file with `bytes=xxx-` header in proxy mode, seed and peer will generate different taskids. Because there are different range fields in urlMeta. Then...

bug

When using `SetAutoMergeCellsByColumnIndex`, there are wasted space in table. Because we print empty line in merged cells. This pr will merge lines with the same column value in `SetAutoMergeCellsByColumnIndex` to...