Merge branch 'feature/set_static_ip_to_zero' into 'master'

Zero static IP address can also be set



See merge request !1101

components/tcpip_adapter/tcpip_adapter_lwip.c

@@ -346,8 +346,7 @@ esp_err_t tcpip_adapter_set_ip_info(tcpip_adapter_if_t tcpip_if, tcpip_adapter_i
 
     TCPIP_ADAPTER_IPC_CALL(tcpip_if, 0, ip_info, 0, tcpip_adapter_set_ip_info_api);
 
-    if (tcpip_if >= TCPIP_ADAPTER_IF_MAX || ip_info == NULL ||
-            ip4_addr_isany_val(ip_info->ip) || ip4_addr_isany_val(ip_info->netmask)) {
+    if (tcpip_if >= TCPIP_ADAPTER_IF_MAX || ip_info == NULL) {
         return ESP_ERR_TCPIP_ADAPTER_INVALID_PARAMS;
     }