R1:37b93f426225

Don't require POST to download LFS files from main domain

Summary:
Ref T7789. If you don't have `security.alternate-file-domain` configured, we won't serve binary files over GET.

This is a security measure intended to prevent `<applet src="..." />` attacks and similar, where you upload some "dangerous" binary, include it in another page, and it gets some of the host's permissions because Java/Flash security models are (or were, in the past) goofy.

Allow them to be served over GET if the client is Git…