fuuko: Note router/AP in readme

machines/fuuko/README.md

@@ -13,12 +13,28 @@ Custom build in a be quiet! Pure Base 600.
  * GPU (required for text console/firmware due to lack of integrated graphics in R5 1400): NVIDIA Quadro NVS 290 (the PCIe x1 variant)
  * Case fan: Noctua NF-A9 PWM
  * Blu-ray burner LG WH16NS60
+ * Wireless card Gigabyte GC-WB1733D-I
+   (includes user-serviceable Intel Wireless-AC 9260 card)
 
 ## Purpose
 
 It is my main storage server
 that is responsible for handling storage and processing of big files
 to which I need a high throughput connection.
+It also acts as a router for my home network
+and provides a wireless access point.
+
+## Notes on Wireless
+
+TL;DR: Never try to build an AP yourself, just get a dedicated AP and use OpenWrt.
+
+ * Wireless cards are M.2 A+E key and don’t fit in a M.2 E key slot,
+   because apparently using USB for Bluetooth is a good idea.
+ * Intel Wireless cards only support AP mode on 2.4 GHz [because of broken LAR](https://bugzilla.kernel.org/show_bug.cgi?id=206469).
+ * Almost all wireless cards only support one band at the same time (no dual-band AP).
+ * Realtek Wireless cards don’t work at all (no wonder).
+ * Hostapd’s configuration file is … interesting.
+ * Regulatory stuff is fun.
 
 ## Name