pgsql: Include SSL compression status in psql banner and connection log

Include SSL compression status in psql banner and connection logging

Both the psql banner and the connection logging already included
SSL status, cipher and bitlength, this adds the information about
compression being on or off.

Branch
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REL9_4_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/d3c980694fa4523a8aa66b57343f031c4b6b8425

Modified Files
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src/backend/utils/init/postinit.c |   10 ++++++----
src/bin/psql/command.c            |    5 +++--
2 files changed, 9 insertions(+), 6 deletions(-)