Merge pull request 'switch default tunnel mode to tun as is required less overhead and thus the MTU can be higher' (#22) from mark22k/docs:fastd_tuntap into master

Reviewed-on: https://codeberg.org/CRXN/docs/pulls/22

docs/tunneling/fastd.md

@@ -27,7 +27,7 @@ Create a file with the template and instructions below in `/etc/fastd/crxn/fastd
 
 ```
 # The interface that will connect to the virtual ethernet network fastd connects us to
-mode multitap;
+mode tun;
 
 # The encryption method (don't change this unless you need to)
 method "salsa2012+umac";