[COMMITTERS] pgsql: Add missing ALTER USER variants

Add missing ALTER USER variants

ALTER USER ... SET did not support all the syntax variants of ALTER ROLE
...  SET.

Reported-by: Pavel Golub <pavel@microolap.com>

Branch
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REL9_2_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/22eb38caa11979e3d89030eb30c9897bbb9e05ef

Modified Files
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doc/src/sgml/ref/alter_user.sgml | 8 ++++----
src/backend/parser/gram.y        | 6 +++---
2 files changed, 7 insertions(+), 7 deletions(-)