mosquitto_ctrl dynsec now also allows -i to specify a clientid

This is as well as `-c`. This matches the documentation which states `-i`.

Closes #3219. Thanks to dkusalic

ChangeLog.txt

@@ -8,6 +8,9 @@ Broker:
   an IPv6 link-local address and no other IPv6 addresses. Closes #2696.
 - Fix mismatched wrapped/unwrapped memory alloc/free in properties. Closes #3192.
 
+Apps:
+- mosquitto_ctrl dynsec now also allows `-i` to specify a clientid as well as
+  `-c`. This matches the documentation which states `-i`. Closes #3219.
 Client library:
 - Fix threads linking on Windows for static libmosquitto library
   Closes #3143

apps/mosquitto_ctrl/dynsec.c

@@ -49,7 +49,7 @@ void dynsec__print_usage(void)
 	printf("Set group for anonymous clients: setAnonymousGroup   <groupname>\n");
 
 	printf("\nClients\n-------\n");
-	printf("Create a new client:         createClient      <username> [-c clientid] [-p password]\n");
+	printf("Create a new client:         createClient      <username> [-i clientid] [-p password]\n");
 	printf("Delete a client:             deleteClient      <username>\n");
 	printf("Set a client password:       setClientPassword <username> [password]\n");
 	printf("Set a client id:             setClientId       <username> [clientid]\n");

apps/mosquitto_ctrl/dynsec_client.c

@@ -40,9 +40,9 @@ int dynsec_client__create(int argc, char *argv[], cJSON *j_command)
 	username = argv[0];
 
 	for(i=1; i<argc; i++){
-		if(!strcmp(argv[i], "-c")){
+		if(!strcmp(argv[i], "-c") || !strcmp(argv[i], "-i")){
 			if(i+1 == argc){
-				fprintf(stderr, "Error: -c argument given, but no clientid provided.\n");
+				fprintf(stderr, "Error: -i argument given, but no clientid provided.\n");
 				return MOSQ_ERR_INVAL;
 			}
 			clientid = argv[i+1];