pgsql: Support silent mode for service registrations on win32

Support silent mode for service registrations on win32

Using -s when registering a service will now suppress
the application eventlog entries stating that the service
is starting and started.

MauMau

Branch
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REL9_0_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/15fe829b23ad1871ed0b27d807371cbd37768289

Modified Files
--------------
doc/src/sgml/ref/pg_ctl-ref.sgml | 1 +
src/bin/pg_ctl/pg_ctl.c | 6 ++++++
2 files changed, 7 insertions(+), 0 deletions(-)