Fix id3.org link

See merge request !15

Same update as old_format.html. The site is no longer serving
`www.id3.org` urls and must use the bare domain.

Fix broken links in old_format.html

See merge request !14

Replace dead links with archive.org pages, and prefer https.

Based on a patch by Blackilykat, https://github.com/xiph/flac-website/pull/8/
Closes https://github.com/xiph/flac-website/issues/7

Add redirect page for modules -> topics

See merge request !13

Release FLAC 1.5.0

See merge request !12

Point to RFC for format spec and IANA for application IDs

See merge request !11

Add release of FLAC 1.4.3

See merge request !10

Fix a lot of broken links

See merge request !9

Fix a bunch of dead links, add some software to tasks page

See merge request !8

Various fixes

See merge request !7

Add release of FLAC 1.4.2

See merge request !6

Add release of FLAC 1.4.1

See merge request xiph/flac-website!5

Besides the version number change, there have been some improvements

Publish release of FLAC 1.4.0

See merge request !4

Packages on Amiga page are severly outdated (FLAC 1.1.4) and the
Irix page is gone.

Also, a statement about redistributing FLAC code under a different
license is removed. Perhaps at one point it was possible to have
all devs agree, but nowadays I highly doubt everyone that did a
significant contribution can be reached in a timely matter