Feature: Replaced free()-strdup() in event code with util_replace_string()

See: #2370

src/event_exec.c

@@ -275,10 +275,7 @@ int event_get_exec(event_registration_t *er, config_options_t *options) {
                  * <option name="default_arguments" value="..." /> (for values see near top of documment)
                  */
                 if (strcmp(cur->name, "executable") == 0) {
-                    free(self->executable);
-                    self->executable = NULL;
-                    if (cur->value)
-                        self->executable = strdup(cur->value);
+                    util_replace_string(&(self->executable), cur->value);
                 } else if (strcmp(cur->name, "default_arguments") == 0) {
                     self->argvtype = __str2argvtype(cur->value);
                 } else {

src/event_log.c

@@ -64,10 +64,7 @@ int event_get_log(event_registration_t *er, config_options_t *options) {
              * <option name="level" value="..." />
              */
             if (strcmp(options->name, "prefix") == 0) {
-                free(self->prefix);
-                self->prefix = NULL;
-                if (options->value)
-                    self->prefix = strdup(options->value);
+                util_replace_string(&(self->prefix), options->value);
             } else if (strcmp(options->name, "level") == 0) {
                 self->level = ICECAST_LOGLEVEL_INFO;
                 if (options->value)

src/event_url.c

@@ -122,19 +122,13 @@ int event_get_url(event_registration_t *er, config_options_t *options) {
              * <option name="action" value="..." />
              */
             if (strcmp(options->name, "url") == 0) {
-                free(self->url);
-                self->url = NULL;
-                if (options->value)
-                    self->url = strdup(options->value);
+                util_replace_string(&(self->url), options->value);
             } else if (strcmp(options->name, "username") == 0) {
                 username = options->value;
             } else if (strcmp(options->name, "password") == 0) {
                 password = options->value;
             } else if (strcmp(options->name, "action") == 0) {
-                free(self->action);
-                self->action = NULL;
-                if (options->value)
-                    self->action = strdup(options->value);
+                util_replace_string(&(self->action), options->value);
             } else {
                 ICECAST_LOG_ERROR("Unknown <option> tag with name %s.", options->name);
             }