- Use a spin lock to protect OSKit instead of a recursive mutex

 - Use a spin lock to protect OSKit instead of a recursive mutex
 - Remove the now unused recursive mutex code
 - Don't clear the SS_ISCONNECTING flag when soconnect returns EINPROGRESS because it causes a crash during soreceive
 - Lock CONNECTION_ENDPOINT and ADDRESS_FILE structs better
 - Remove incorrect IoMarkIrpPending calls
 - Remove useless ASSERT_LOCKED
 - Don't destroy so_connection when we close a connection
 - Remove useless FileFindConnectionByContext
 - Remove SignalledConnectionsList and SignalledConnectionsLock and simply loop through ConnectionEndpointList for signalled connections
 - Add connections to ConnectionEndpointList in TCPAllocateConnectionEndpoint instead of FileOpenConnection so we don't miss listeners
 - Remove connections from ConnectionEndpointList in TCPFreeConnectionEndpoint instead of FileCloseConnection so we don't miss listeners
 - Use ExInterlockedRemoveHeadList to remove entries in the address file's request lists
 - Remove useless members, flags, and variables in titypes.h and tcp.h
 - Fixes bug 4955 and 4434

svn path=/trunk/; revision=44163