Update mbed-coap to version 4.4.2

Contains one error fix:
IOTCLT-2469 CoAP UDP retransmission does not work for blocks after first one for requests (Eg. registration POST)

NOTE! These are internal changes required for cloud client. This has no direct relevance to any mbed-os functionality.

Author: Antti Yli-Tokola

features/FEATURE_COMMON_PAL/mbed-coap/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Change Log
 
+## [v4.4.2](https://github.com/ARMmbed/mbed-coap/releases/tag/v4.4.2) 
+**Closed issues:**
+ - IOTCLT-2469 CoAP UDP retransmission does not work for blocks after first one for requests (Eg. registration POST)
+
+-[Full Changelog](https://github.com/ARMmbed/mbed-coap/compare/v4.4.1...v4.4.2)
+
 ## [v4.4.1](https://github.com/ARMmbed/mbed-coap/releases/tag/v4.4.1) 
 **Closed issues:**
  - IOTCLT-2539 Block wise messaging call-backs not working logically

features/FEATURE_COMMON_PAL/mbed-coap/module.json

@@ -1,6 +1,6 @@
 {
   "name": "mbed-coap",
-  "version": "4.4.1",
+  "version": "4.4.2",
   "description": "COAP library",
   "keywords": [
     "coap",

features/FEATURE_COMMON_PAL/mbed-coap/source/sn_coap_protocol.c

@@ -1732,8 +1732,17 @@ static sn_coap_hdr_s *sn_coap_handle_blockwise_message(struct coap_s *handle, sn
                     }
 
                     sn_coap_builder_2(dst_ack_packet_data_ptr, src_coap_blockwise_ack_msg_ptr, handle->sn_coap_block_data_size);
+
                     handle->sn_coap_tx_callback(dst_ack_packet_data_ptr, dst_packed_data_needed_mem, src_addr_ptr, param);
 
+#if ENABLE_RESENDINGS
+                    uint32_t resend_time = sn_coap_calculate_new_resend_time(handle->system_time, handle->sn_coap_resending_intervall, 0);
+                    sn_coap_protocol_linked_list_send_msg_store(handle, src_addr_ptr,
+                            dst_packed_data_needed_mem,
+                            dst_ack_packet_data_ptr,
+                            resend_time, param);
+#endif
+
                     handle->sn_coap_protocol_free(dst_ack_packet_data_ptr);
                     dst_ack_packet_data_ptr = 0;
 
@@ -2053,13 +2062,13 @@ static sn_coap_hdr_s *sn_coap_handle_blockwise_message(struct coap_s *handle, sn
                     handle->sn_coap_tx_callback(dst_ack_packet_data_ptr,
                                                 dst_packed_data_needed_mem, src_addr_ptr, param);
 
-    #if ENABLE_RESENDINGS
+#if ENABLE_RESENDINGS
                     uint32_t resend_time = sn_coap_calculate_new_resend_time(handle->system_time, handle->sn_coap_resending_intervall, 0);
                     sn_coap_protocol_linked_list_send_msg_store(handle, src_addr_ptr,
                             dst_packed_data_needed_mem,
                             dst_ack_packet_data_ptr,
                             resend_time, param);
-    #endif
+#endif
                     handle->sn_coap_protocol_free(dst_ack_packet_data_ptr);
                     dst_ack_packet_data_ptr = 0;
                 }