pptpd: backport from trunk

Signed-off-by: Luka Perkov <luka@openwrt.org>

net/pptpd/files/options.pptpd

@@ -0,0 +1,22 @@
+#debug
+#logfile /tmp/pptp-server.log
+auth
+name "pptp-server"
+lcp-echo-failure 3
+lcp-echo-interval 60
+default-asyncmap
+mtu 1482
+mru 1482
+nobsdcomp
+nodeflate
+#noproxyarp
+#nomppc
+mppe required,no40,no56,stateless
+require-mschap-v2
+refuse-chap
+refuse-mschap
+refuse-eap
+refuse-pap
+#ms-dns 172.16.1.1
+#plugin radius.so
+#radius-config-file /etc/radius.conf