Add MQTT to CHANGELOG (too late for 2.0.1 release...)

Fix compilation of unit tests

CHANGELOG

@@ -10,6 +10,9 @@ HISTORY
   * tcp.h/.c: added function tcp_listen_with_backlog_and_err() to get the error
     reason when listening fails (bug #49861)
 
+  2016-12-20: Erik Andersen
+  * Add MQTT client
+
   2016-12-14: Jan Breuer:
   * opt.h, ndc.h/.c: add support for RDNSS option (as per RFC 6106)
 

UPGRADING

@@ -8,6 +8,8 @@ with newer versions.
 
   * [Enter new changes just after this line - do not remove this line]
 
+(2.0.1)
+
   ++ Application changes:
 
   * UDP does NOT receive multicast traffic from ALL netifs on an UDP PCB bound to a specific

test/unit/dhcp/test_dhcp.c

@@ -127,8 +127,6 @@ static enum tcase {
 static int debug = 0;
 static void setdebug(int a) {debug = a;}
 
-#define netif_dhcp_data(netif) ((struct dhcp*)(netif)->client_data[LWIP_NETIF_CLIENT_DATA_INDEX_DHCP])
-
 static int tick = 0;
 static void tick_lwip(void)
 {