squid-2.HEAD: some changes to client_side.c for invalid requests.

Hello!

I'm using these changes for some time. Maybe they will be useful.

1. Set conn->transparent early after connection establishment and reset
connection on transparent connections when there is no valid request.

2. Check http->entry && http->entry->mem_obj && http->entry->mem_obj->reply
to avoid NULL pointer dereference (I had one quite some time ago).

3. create method object even for invalid requests (this fixes null pointer
dereferences in many other places).

-- 
   Alexander.