Thread: pgsql: Document that pg_upgrade requires PGHOST be set for any pre-9.1

Document that pg_upgrade requires PGHOST be set for any pre-9.1 servers
with a socket directory mismatch with the new server.

Backpatch to 9.2.

Branch
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REL9_2_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/469530b37094515717947a997e7e77737bb70a60

Modified Files
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doc/src/sgml/pgupgrade.sgml |    9 ++++-----
1 files changed, 4 insertions(+), 5 deletions(-)