File header_size.patch of Package apache2
--- httpd-2.2.14/include/httpd.h 2009-01-08 02:24:16.000000000 +0100
+++ httpd-2.2.14/include/httpd.h 2010-03-17 11:27:06.000000000 +0100
@@ -193,11 +193,11 @@
/** default limit on bytes in Request-Line (Method+URI+HTTP-version) */
#ifndef DEFAULT_LIMIT_REQUEST_LINE
-#define DEFAULT_LIMIT_REQUEST_LINE 8190
+#define DEFAULT_LIMIT_REQUEST_LINE 99326
#endif
/** default limit on bytes in any one header field */
#ifndef DEFAULT_LIMIT_REQUEST_FIELDSIZE
-#define DEFAULT_LIMIT_REQUEST_FIELDSIZE 8190
+#define DEFAULT_LIMIT_REQUEST_FIELDSIZE 99326
#endif
/** default limit on number of request header fields */
#ifndef DEFAULT_LIMIT_REQUEST_FIELDS