Обсуждение: pgsql: Update copyright for 2018

Update copyright for 2018

Backpatch-through: certain files through 9.3

Branch
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REL9_6_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/1a6429d455962191da78a61475b89b434643385e

Modified Files
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COPYRIGHT               | 2 +-
doc/src/sgml/legal.sgml | 6 +++---
2 files changed, 4 insertions(+), 4 deletions(-)