Update comments

README.md

@@ -46,4 +46,4 @@
 
 ## pptp.sh(Deprecated, DO NOT USE)
 
-Copyright (C) 2013-2020 Teddysun <[email protected]>
+Copyright (C) 2013-2021 Teddysun <[email protected]>

wireguard.sh

@@ -660,6 +660,7 @@ EOF
 PublicKey = ${CLIENT_PUBLIC_KEY}
 AllowedIPs = ${CLIENT_WG_IPV4}/32,${CLIENT_WG_IPV6}/128
 PresharedKey = ${CLIENT_PRE_SHARED_KEY}
+PersistentKeepalive = 25
 EOF
     else
         cat > ${new_client_if} <<EOF
@@ -680,6 +681,7 @@ EOF
 PublicKey = ${CLIENT_PUBLIC_KEY}
 AllowedIPs = ${CLIENT_WG_IPV4}/32
 PresharedKey = ${CLIENT_PRE_SHARED_KEY}
+PersistentKeepalive = 25
 EOF
     fi
     chmod 600 ${new_client_if}