Add exception for Rule 17.11

Author: tony-josi-aws

MISRA.md

@@ -228,3 +228,13 @@ _Ref 21.6.1_
   The function `snprintf` is used to insert information in a logging string.
   This is only used in a utility function which aids in debugging and is not
   part of the 'core' code governing the functionality of the TCP/IP stack.
+
+#### Rule 17.11
+
+_Ref 17.11_
+
+- MISRA C-2012 Rule 17.11 advises that functions that never returns should be 
+declared with a _Noreturn function specifier. However, in this case, `_Noreturn`
+is added by C standard as part of C11 and the FreeRTOS+TCP codebase is compatible
+with C90. This is a false positive as the Coverity is also run with C90 
+as the standard. 

source/FreeRTOS_IP.c

@@ -208,6 +208,8 @@ static BaseType_t xIPTaskInitialised = pdFALSE;
 
 /* MISRA Ref 8.13.1 [Not decorating a pointer to const parameter with const] */
 /* More details at: https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/blob/main/MISRA.md#rule-813 */
+/* MISRA Ref 17.11 [A function that never returns should be declared with a _Noreturn function specifier] */
+/* More details at: https://github.com/FreeRTOS/FreeRTOS-Plus-TCP/blob/main/MISRA.md#rule-1711 */
 /* coverity[misra_c_2012_rule_8_13_violation] */
 /* coverity[misra_c_2012_rule_17_11_violation] */
 static void prvIPTask( void * pvParameters )