Thread: pgsql: Sync our copy of the timezone library with IANA release tzcode20

Sync our copy of the timezone library with IANA release tzcode2020d.

There's no functional change at all here, but I'm curious to see
whether this change successfully shuts up Coverity's warning about
a useless strcmp(), which appeared with the previous update.

Discussion: http://mm.icann.org/pipermail/tz/2020-October/029370.html

Branch
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REL9_5_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/ff26f804aea169435a969588ac21272f4f8c3aa9

Modified Files
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src/timezone/README |  2 +-
src/timezone/zic.c  | 14 ++++++++++++--
2 files changed, 13 insertions(+), 3 deletions(-)