Remove a number of historical protocol entries from pppd's builtin list, this
reduced the binary size without loss of features.
-Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>
+Signed-off-by: Jo-Philipp Wich <jo@mein.io>
--- a/pppd/main.c
+++ b/pppd/main.c