Feature request: numbering errors in output

[admin60]

It would be a nice feature to have the errors numbered. I'm using the HTML output and it would be very helpful to have all the errors and warnings having a number starting from #1.

[dpalic]

Thank you for the issue report. Sadly this project is dead, and a new team is around with https://github.com/linkcheck/linkchecker
for more details please see: #708
Also please close this issue and report it freshly on the new repo https://github.com/linkcheck/linkchecker/issues