Follow-up to r1778350

Remove useless tests in order to avoid the duplication of a message.
Be consistent with "FPM" vs "PHP-FPM" usage messages.
Fix style issues.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1778500 13f79535-47bb-0310-9956-ffa450edef68