=== modified file 'src/http.cc'
--- src/http.cc	2008-06-20 04:43:01 +0000
+++ src/http.cc	2008-09-14 23:21:51 +0000
@@ -1559,6 +1559,8 @@
             hdr_out->putStr(HDR_FRONT_END_HTTPS, "On");
     }
 
+    hdr_out->putStr(HDR_KEEP_ALIVE, "300");
+
     /* Now mangle the headers. */
     if (Config2.onoff.mangle_request_headers)
         httpHdrMangleList(hdr_out, request, ROR_REQUEST);