pgsql: Fix pg_isready to handle conninfo properly.

Fix pg_isready to handle conninfo properly.

pg_isready displays the host name and the port number that it uses to connect
to the server. So far, pg_isready didn't use the conninfo specified in -d option
for calculating those host name and port number. This can lead to wrong display
to a user. This commit changes pg_isready so that it uses the conninfo for that
calculation.

Original patch by Phil Sorber, modified by me.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/941c4ece98d08113b557bc8e7dbd8a9ac0ffac3e

Modified Files
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src/bin/scripts/pg_isready.c | 116 +++++++++++++++++++++++-------------------
1 file changed, 64 insertions(+), 52 deletions(-)