mpm_winnt service.c: Normalize error and status messages, clean up

source formatting

Backport: r1611165
Reviewed by: wrowe, gsmith



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1652265 13f79535-47bb-0310-9956-ffa450edef68