example config: Add describing comments

Signed-off-by: Adrian 'nex' Schollmeyer <adrian.schollmeyer@fem.tu-ilmenau.de>

fem-netbox-user-scripts.example.conf

 [auth]
+; URL to the NetBox instance
 url = https://netbox.fem.tu-ilmenau.de
+; TODO: Insert your NetBox token here
+; You can generate a token here:
+; https://netbox.fem.tu-ilmenau.de/user/api-tokens/
 token = token
 
 [dokuwiki]
 url = https://wiki.fem.tu-ilmenau.de
 
 [ldap]
+; TODO: Insert your LDAP credentials
+; LDAP username
 username = foo
+; Either use a password:
 password = bar