Prepare for win32 to share the common config file.

Note the quotes for "logs/access_log" which let us
toggle this to access.log, while leaving the custom
log format specifier pretty_log alone.

Also, prefer the user specified port for example
ServerName directive.

Backports: r606135


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@606166 13f79535-47bb-0310-9956-ffa450edef68