pgsql: Have pg_ctl return an exit status of 3 if the server is not runn

Have pg_ctl return an exit status of 3 if the server is not running, to
match the Linux Standard Base Core Specification 3.1.

Aaron W. Swenson

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/12ff9fa7715611d7df6a78447fce6cc5096cf335

Modified Files
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doc/src/sgml/ref/pg_ctl-ref.sgml |    3 ++-
src/bin/pg_ctl/pg_ctl.c          |   14 ++++++++++----
2 files changed, 12 insertions(+), 5 deletions(-)