Write an output extension for `pywb` replay (assuming it's possible) to fix the relative `<time>` problem.

[Lisias]

Since I decided to bite the bullet and customize pywb for my objectives...

On Forum, fellow Kerbonaut RKunze suggesting mangling the <time> to get rid of the relatives timestamps I complained here.

Given the premises of the project, absolutely no derivatives, I can't mangle the bitstream as I need to write in the WARC file exactly what I received from Forum.

But this doesn't means that the idea can't be useful! This issue is to remember me to try something.

[Lisias]

Removing comments just for house keeping. Refer to this discussion.