LinuxServer Changes:
Switching to new Base images, shift to arm32v7 tag.
Jackett Changes:
icetorrent: handle both kinds of date selectors (Thank you @garfield69)
retroflix: release_year and quality are optional. (Thank you @garfield69)
add hd4fans a private Chinese site. resolves #6482 (Thank you @garfield69)
add springsunday a private Chinese site. resolves #6483 (Thank you @garfield69)
shareisland: update categories (#6512) (Thank you @Jorman)
add hdu a private Chinese site. resolves #5746 (Thank you @garfield69)
Merge branch 'master' of https://github.com/Jackett/Jackett (Thank you @garfield69)