Clients: Fix config files truncating options after the first space.

Closes #2059. Thanks to Jason White.

ChangeLog.txt

@@ -19,6 +19,7 @@ Client library:
 Clients:
 - mosquitto_sub will now quit with an error if the %U option is used on
   Windows, rather than just quitting. Closes #1908.
+- Fix config files truncating options after the first space. Closes #2059.
 
 Apps:
 - Perform stricter parsing of input username in mosquitto_passwd. Closes

client/client_shared.c

@@ -299,7 +299,7 @@ int client_config_load(struct mosq_config *cfg, int pub_or_sub, int argc, char *
 				 * program name as the first entry. */
 				args[1] = strtok(line, " ");
 				if(args[1]){
-					args[2] = strtok(NULL, " ");
+					args[2] = strtok(NULL, "");
 					if(args[2]){
 						count = 3;
 					}else{