[COMMITTERS] pgsql: Fix support for some operators (&<, &>, $<|,|&>) in box operato

Fix support for some operators (&<, &>, $<|, |&>) in box operator class
of SP-GiST.

Bug exists since initial commit of box opclass for SP-GiST,
so backpath to 9.6

Author: Nikita Glukhov with minor editorization of tests by me
Reviewed-by: Kyotaro Horiguchi, Anastasia Lubennikova

https://commitfest.postgresql.org/13/981/

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/d5286aa905c9173b3fc4f911682089149bd3caef

Modified Files
--------------
src/backend/utils/adt/geo_spgist.c         |  24 +++++--
src/test/regress/expected/box.out          | 104 +++++++++++++++++++++++++++++
src/test/regress/expected/sanity_check.out |   1 +
src/test/regress/sql/box.sql               |  47 +++++++++++++
4 files changed, 172 insertions(+), 4 deletions(-)