Bulk rename of SJS to FW

PUBLISHED_FROM=03d2fa0b6bf762d09bf5e837cf31e2047bb6eefd

examples/ESP8266_RTOS/user/esp_libc.c

@@ -29,7 +29,7 @@ _ssize_t _write_r(struct _reent *r, int fd, void *buf, size_t len) {
 
 /*
  * You'll need to implement _open_r and friends if you want file operations. See
- * https://github.com/cesanta/smart.js/blob/master/platforms/esp8266/user/esp_fs.c
+ * https://github.com/cesanta/iot/blob/master/platforms/esp8266/user/esp_fs.c
  * for SPIFFS-based implementation.
  */