http_server: enable write-buffering for TCP sockets

When sending http data, we need to minimize the number of TCP packets.
By enabling write-buffering, we can achieve that. However, we need to
make sure that buffers will properly be flushed, not linger.

Conflicts:

	bin/service/http_server.py

bzr revid: p_christ@hol.gr-20110118125959-vk0gzx30bwykn18s

bin/service/http_server.py

@@ -123,10 +123,12 @@ class HttpLogHandler:
     
 class MultiHandler2(HttpLogHandler, MultiHTTPHandler):
     _logger = logging.getLogger('http')
+    wbufsize = 32768
 
 
 class SecureMultiHandler2(HttpLogHandler, SecureMultiHTTPHandler):
     _logger = logging.getLogger('https')
+    wbufsize = 32768
 
     def getcert_fnames(self):
         tc = tools.config

bin/service/websrv_lib.py

@@ -481,6 +481,10 @@ class SecureMultiHTTPHandler(MultiHTTPHandler):
         except Exception:
             pass
 
+    def handle_one_request(self):
+        MultiHTTPHandler.handle_one_request(self)
+        self.wfile.flush()
+
 import threading
 class ConnThreadingMixIn:
     """Mix-in class to handle each _connection_ in a new thread.