[patch v2] manual: Update signal descriptions

[Andreas Schwab]

On Jan 21 2025, Florian Weimer wrote:

> Stefan, does s390x call these notifications “ctrl-alt-del
> notifications”, or this there some other name for them?  Is this kernel
> code path really active on current systems?

It is also available as function key 0x020c (Boot) in the vt keyboard
driver, and used by various other drivers in the kernel (look for
kill_cad_pid and ctrl_alt_del).

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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