pgsql: Update statement about sorting of character-string data.

Update statement about sorting of character-string data.

The sort order is no longer fixed at database creation time, but can be
controlled via COLLATE. Noted by Thomas Kellerer.

Branch
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REL9_1_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/b3bd5a093f3758cf168dae88478f9fc5b37ff6b1

Modified Files
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doc/src/sgml/ref/select.sgml | 9 +++++++--
1 files changed, 7 insertions(+), 2 deletions(-)