Murray,
The username and group under which the web server operates are set in the config file for your server, probably named "httpd.conf". Setting these to be other than root:admin is a good idea for security reasons. For example, the apache config file for the WW server at my institution has the followinglines in it.
User nobody
Group mawebwork
which set the user to "nobody" and the group to "mawebwork". Note that the user and group you use must both exist on your system.
Also, you should not change the ownership of the httpd binary from its default owner:group of root:admin as shown in the output of your ls -l command.
Bill Farr
WPI