pgsql: Sync pg_ctl documentation and usage message with reality.

Sync pg_ctl documentation and usage message with reality.

Commit 05cd12ed5 ("pg_ctl: Change default to wait for all actions")
was a tad sloppy about updating the documentation to match. The
documentation was also sorely in need of a copy-editing pass, having
been adjusted at different times by different people who took little
care to maintain consistency of style.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/8bcb31ad5a7b3f4a0a6e4fbd8cbc1a7a8dde423d

Modified Files
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doc/src/sgml/ref/pg_ctl-ref.sgml | 205 +++++++++++++++++++++------------------
src/bin/pg_ctl/pg_ctl.c | 29 +++---
2 files changed, 123 insertions(+), 111 deletions(-)