In the supported sites page, sort the extractors in case insensitive
[youtube-dl] / devscripts / gh-pages /
drwxr-xr-x   ..
-rwxr-xr-x 1130 add-version.py
-rwxr-xr-x 1270 generate-download.py
-rwxr-xr-x 786 sign-versions.py
-rwxr-xr-x 595 update-copyright.py
-rwxr-xr-x 1711 update-feed.py
-rwxr-xr-x 958 update-sites.py