Add C comment why client encoding can be set in pg_upgrade.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/e6a740284291d1ebaca42b2954eb20e09daac9b9

Modified Files
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contrib/pg_upgrade/server.c |    1 +
1 files changed, 1 insertions(+), 0 deletions(-)

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