* the default 'httpclose' option only sets the 'Connection:' headers

* the default 'httpclose' option only sets the 'Connection:' headers
  to 'close', but does not actually close any connection. The problem
  is, there are some servers which don't close the connection even if
  the proxy tells them 'Connection: close'. A workaround was added by
  the way of a new option 'forceclose' (which implies 'httpclose'),
  and which makes the proxy close the outgoing channel to the server
  once it has sent all its headers. Just don't use this with the
  'CONNECT' method of course !