Update TODO list and fix an error in conditional compilation that I introduced with the last commit.

TODO

@@ -19,7 +19,7 @@ nuttx/:
   (9)  Kernel/Protected Build
   (3)  C++ Support
   (5)  Binary loaders (binfmt/)
- (17)  Network (net/, drivers/net)
+ (18)  Network (net/, drivers/net)
   (4)  USB (drivers/usbdev, drivers/usbhost)
   (2)  Other drivers (drivers/)
   (9)  Libraries (libs/libc/, libs/libm/)
@@ -1663,6 +1663,29 @@ o Network (net/, drivers/net)
                anything but a well-known point-to-point configuration
                impossible.
 
+  Title:       SO_LINGER IMPLEMENTATION IS INCORRECT
+  Description: Support for the SO_LINGER socket option is implemented but
+               not correctly.  Currently, it simply adds a timeout to the
+               "normal" delay for the FIN to be sent with an additional
+               timeout.  That is not even close to the required behavior.
+               Per OpenGroup.org:
+
+                 SO_LINGER
+                   Lingers on a close() if data is present. This option
+                   controls the action taken when unsent messages queue
+                   on a socket and close() is performed. If SO_LINGER
+                   is set, the system shall block the calling thread
+                   during close() until it can transmit the data or
+                   until the time expires. If SO_LINGER is not specified,
+                   and close() is issued, the system handles the call
+                   in a way that allows the calling thread to continue
+                   as quickly as possible. This option takes a linger
+                   structure, as defined in the <sys/socket.h> header,
+                   to specify the state of the option and linger interval.
+
+  Status:      Open
+  Priority:    Medium Low.
+
 o USB (drivers/usbdev, drivers/usbhost)
   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 

net/inet/inet_close.c

@@ -421,9 +421,9 @@ static inline int tcp_close_disconnect(FAR struct socket *psock)
             }
         }
       else
-#else
+#endif
         {
-          (void)net_timedwait(&state.cl_sem, NULL);
+          (void)net_lockedwait(&state.cl_sem);
         }
 
       /* We are now disconnected */