docs: clarify pg_upgrade's recovery behavior

Bruce Momjian <bruce@momjian.us>

Commit: 39a93fd294a0442292de70f2e42e9b1da1c4e3b6
Author: Bruce Momjian <bruce@momjian.us>
Date: 2019-04-17T22:01:01Z
Releases: 9.4.22
docs: clarify pg_upgrade's recovery behavior

The previous paragraph trying to explain --check, --link, and no --link
modes and the various points of failure was too complex.  Instead, use
bullet lists and sublists.

Reported-by: Daniel Gustafsson

Discussion: https://postgr.es/m/qtqiv7hI87s_Xvz5ZXHCaH-1-_AZGpIDJowzlRjF3-AbCr3RhSNydM_JCuJ8DE4WZozrtxhIWmyYTbv0syKyfGB6cYMQitp9yN-NZMm-oAo=@yesql.se

Backpatch-through: 9.4

Files

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doc/src/sgml/pgupgrade.sgml modified +36 −16