bug#26986: 26.0.50; Unsafe recovery should be off by default in batch mode

[Eli Zaretskii]

> From: Philipp <p.stephani2@gmail.com>
> Date: Thu, 18 May 2017 21:44:22 +0200
> 
> In batch mode there will usually be no long-lived buffers with
> non-recoverable contents, therefore the reasoning for
> `attempt-stack-overflow-recovery' and
> `attempt-orderly-shutdown-on-fatal-signal' being t doesn't apply.  This
> means that these variables should be nil by default in batch mode.

I see your point, but what are the arguments for changing their values
in batch mode?  IOW, what advantages will this give us?