pgsql: libpq docs: be clearer about conninfo's 'hostaddr'

libpq docs: be clearer about conninfo's 'hostaddr'

The previous wording was a bit too terse, too vague on the subject of
'host' and 'hostaddr' in connection specifications, which has caused
people to waste time trying to conform to rules because of
misunderstanding the whole thing; this small change should make things
clearer.

Author: Robert Haas, stemming from Fabien Coelho's complaints
Discussion: https://postgr.es/m/alpine.DEB.2.21.1808201323020.13832@lancre

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/75f46eaee20c38b2a04f569e8a5fed4f63091bd3

Modified Files
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doc/src/sgml/libpq.sgml | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)