1.12 [KK 2006-09-13] Small changes in wakeup handler. Timeout handling
     in HTTP service processing slightly changed.
     [KK 2006-09-15] Added checks whether both client and server want
     persisting HTTP connections (see http_serve()). Header
     Proxy-Connection: close is inserted if the connections should get
     closed. Rewrote network to- and fro- copying: net_copy() now
     replaces net_read() + net_write().
     [KK 2006-09-26] Promoted to STABLE.