From: Mark Wooding <mdw@distorted.org.uk>
Date: Sun, 28 Apr 2024 13:00:01 +0000 (+0100)
Subject: prologue.m4: Fix exit statuses.
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/firewall/commitdiff_plain/196c5d1654cd62a1f28b31f2e1f43541cd77737a?hp=196c5d1654cd62a1f28b31f2e1f43541cd77737a

prologue.m4: Fix exit statuses.

Exit 1 if installation failed but restoration of the previous state
succeeded; exit 2 if things are now buggered.
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