pgsql: Fix the MSVC build for versions 2015 and later.

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pgsql: Fix the MSVC build for versions 2015 and later.

Amit Kapila-3
Fix the MSVC build for versions 2015 and later.

Visual Studio 2015 and later versions should still be able to do the same
as Visual Studio 2012, but the declaration of locale_name is missing in
_locale_t, causing the code compilation to fail, hence this falls back
instead on to enumerating all system locales by using EnumSystemLocalesEx
to find the required locale name.  If the input argument is in Unix-style
then we can get ISO Locale name directly by using GetLocaleInfoEx() with
LCType as LOCALE_SNAME.

In passing, change the documentation references of the now obsolete links.

Note that this problem occurs only with NLS enabled builds.

Author: Juan José Santamaría Flecha, Davinder Singh and Amit Kapila
Reviewed-by: Ranier Vilela and Amit Kapila
Backpatch-through: 9.5
Discussion: https://postgr.es/m/CAHzhFSFoJEWezR96um4-rg5W6m2Rj9Ud2CNZvV4NWc9tXV7aXQ@...

Branch
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REL_11_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/1fbfc3d8a59a570db1e13e8a54b0774e7255ced0

Modified Files
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src/backend/utils/adt/pg_locale.c | 183 ++++++++++++++++++++++++++++++++++++--
1 file changed, 175 insertions(+), 8 deletions(-)