Updated MTU in 03-wireless-ad-hoc.network

Added link to open mesh page announcing systemd support

README.md

@@ -28,7 +28,7 @@ or anyone else advocating for their rights).
 
 ## Requirements
 
-- systemd{,-networkd} v248 or more (for batman support)
+- systemd{,-networkd} v248 or more (for [batman support][batman-systemd])
 - Linux kernel with batman-adv module (if `modinfo batman-adv` shows
   no error then you already have it)
 - iwd (for starting ad-hoc network)
@@ -157,3 +157,4 @@ This project is in alpha stage. Documentation is incomplete.
 [python-dasbus]: https://github.com/rhinstaller/dasbus
 [naxalnet-git]: https://aur.archlinux.org/packages/naxalnet-git
 [arch-resolved]: https://wiki.archlinux.org/title/Systemd-resolved#DNS
+[batman-systemd]: https://www.open-mesh.org/news/101

systemd-networkd/03-wireless-ad-hoc.network

@@ -3,6 +3,11 @@
 # It assumes there is only one interface in ad-hoc mode.
 WLANInterfaceType=ad-hoc
 
+[Link]
+# BATMAN packets are 32 bits larger than normal packets
+# and I don't know what that means
+MTUBytes=1560
+
 [Network]
 Description=ad-hoc network connecting to other nodes
 BatmanAdvanced=bat0