cgit 1.2.3: lighttpd 1.4.57, AlpineLinux [edge]: using cache breaks delivery

[Jon DeVree]

I think that this is a bug in the 5.10 kernel.

I just hit it on a previously working cgit host by upgrading the kernel
from 5.9.15 to 5.10.4. Downgrading the kernel back to 5.9.15 fixes it.

I'm guessing it was broken by 36e2c7421f02 ("fs: don't allow splice
read/write without explicit ops") because if I crank up kernel logging I
get:

    splice write not supported for file  (pid: 2522 comm: cgit.cgi)

-- 
Jon
Doge Wrangler
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