[COMMITTERS] pgsql: Expand set of predefined ICU locales

Expand set of predefined ICU locales

Install language+region combinations even if they are not distinct from
the language's base locale.  This gives better long-term stability of
the set of predefined locales and makes the predefined locales less
implementation-dependent and more practical for users.

Reviewed-by: Peter Geoghegan <pg@bowt.ie>

Branch
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REL_10_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/a79fb8e0c452a9b88206e2abd4add2b432a2596b

Modified Files
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doc/src/sgml/charset.sgml            | 13 ++++++-------
src/backend/commands/collationcmds.c | 15 ++++++++++++---
2 files changed, 18 insertions(+), 10 deletions(-)