pgsql: docs: In ecpg, clarify how username/password colon parameters a

docs: In ecpg, clarify how username/password colon parameters are used

Backpatch to 9.2.

Patch from Alan B

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/88886c79cc4fc8d8f7c5b7304ad1f13508f5b025

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

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