This patch did it:
http://cvs.apache.org/viewcvs.cgi/apache-1.3/src/main/http_request.c?r1=1.173&r2=1.174
Backing out the patch also fixes a DAV regression. See
http://issues.apache.org/bugzilla/show_bug.cgi?id=29237
See also
http://issues.apache.org/bugzilla/show_bug.cgi?id=29257 http://www.rtr.com/fp2002disc/_disc2/00000a71.htm
