Proxy Servers and Suffix types

The CERN httpd User's guide in section 4.7 mentions that cern_httpd has extensive built-in suffinx definitions. Can anyone tell me where these are listed? I had to add an AddType definition for .hqx files whereas I thought it could have quite possibly been built in.

Monica Berko                                     Email:Monica.Berko@anu.edu.au
Centre for Networked Information and Publishing  Phone: (06) 279 8114
Australian National University                   Fax:   (06) 279 8120