Link to "Upgrading a PostgreSQL Cluster" in Release Notes

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Following a complaint on IRC about the dearth of information on how to
migrate to a new major version in the release notes, the attached
trivial patch was determined to be sufficient for the OP.


This patch applies to REL_12_STABLE.  I don't know how far it should be
backpatched (the OP was trying to upgrade to v10), and I didn't see any
place to put it for 13 and future versions.

-- 

Vik Fearing


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diff --git a/doc/src/sgml/release-12.sgml b/doc/src/sgml/release-12.sgml
index dfa3851913..62cdbba2d5 100644
--- a/doc/src/sgml/release-12.sgml
+++ b/doc/src/sgml/release-12.sgml
@@ -1216,6 +1216,8 @@ Branch: REL9_4_STABLE [8f8809091] 2019-10-04 15:38:36 -0400
     A dump/restore using <xref linkend="app-pg-dumpall"/>, or use of <xref
     linkend="pgupgrade"/>, is required for those wishing to migrate data
     from any previous release.
+    See <xref linkend="upgrading"/> for general information on migrating to
+    new major releases.
    </para>
 
    <para>

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