I found this at apache.org. for the darwin README file. I hope it helps.
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Note that unlike Apache HTTPD installed with Mac OS X, we call the
server configuration file httpd.conf, not apache.conf, and the server
itself httpd, not apache. You may want to link apache.conf to
httpd.conf if you want Setup Assistant and Preferences to be able edit
your config file for you. The server itself is started by the
apachectl script, which is not renamed on Mac OS X, so you don't need
to do anything for Setup Assistant and Preferences to find and launch
the server.
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