Fix dead URLs in Haiku website list of conferences

[cafeina]

Fix dead URLs in Haiku website list of conferences replacing them with archived versions. The official website links could stay as text, (example: <a href="​http://archivedlink">​http://originallink</a>) but the dead links should change in the following cases:

In ​https://www.haiku-os.org/conference/

SCaLE 7x Los Angeles:

​http://scale7x.socallinuxexpo.org -> ​https://www.socallinuxexpo.org/scale7x/

WhyFLOSS Conference (there is not an archived source of the entry, but there is one of the general schedule)

​http://www.whyfloss.com/es/conference/laplata08/program/130 -> ​https://web.archive.org/web/20090228153336/http://www.whyfloss.com/es/conference/laplata08/program

Live eTIC Party Université Montpellier 2008

​http://linux-live-usb.org/ip/index.php -> ​https://web.archive.org/web/20081120053905/http://linux-live-usb.org/ip/index.php

etc.

It is just replace the original URL with an archived version in Internet Archive, or sometimes with the new location of the conference page when was moved without a redirect.

The same should be done to the conferences subpages too.