update comments

/etc/ipsec.conf: added "sha2-truncbug=yes"

Signed-off-by: Teddysun <[email protected]>

l2tp.sh

@@ -351,6 +351,7 @@ conn l2tp-psk-nonat
     dpddelay=40
     dpdtimeout=130
     dpdaction=clear
+    sha2-truncbug=yes
 EOF
 
     cat > /etc/ipsec.secrets<<EOF