pgsql: Revert "Fix "pg_ctl start -w" to test child process status direc

Revert "Fix "pg_ctl start -w" to test child process status directly."

This reverts commit c869a7d5b44e7164fadfb638786def05d510312a.
As pointed out by Maksym Sobolyev in bug #14199, that approach doesn't
work if the postmaster forks itself an extra time due to silent_mode
being enabled. We removed silent_mode in 9.2, so the pg_ctl change is
fine in 9.2 and later, but it fails when that option is enabled in 9.1.
Seeing that 9.1 is close to end-of-life, let's adopt the most conservative
fix we can, which is to revert the pg_ctl change in the 9.1 branch.

Discussion: <20160618042812(dot)5798(dot)85609(at)wrigleys(dot)postgresql(dot)org>

Branch
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REL9_1_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/d56c02f1ac9247295ec1e5143361020a91f708c8

Modified Files
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src/bin/pg_ctl/pg_ctl.c | 185 ++++++++++++++++++++----------------------------
1 file changed, 78 insertions(+), 107 deletions(-)