pgsql-server: Extend pg_ctl to handle service management under WIN32.

Log Message:
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Extend pg_ctl to handle service management under WIN32. Lacks docs.

Claudio Natoli and Magnus Hagander

Modified Files:
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pgsql-server/src/bin/pg_ctl:
pg_ctl.c (r1.16 -> r1.17)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/bin/pg_ctl/pg_ctl.c.diff?r1=1.16&r2=1.17)