start-stop-daemon: fix --quiet switch

The --quiet switch wasn't really quiet, because we changed it to report
errors. I am changing it back due to discussions on the listed bugs.

X-Gentoo-Bug: 482396
X-Gentoo-Bug: 439174
X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=482396
X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=439174