Add pppd23 2.3.11,
This is port for version 2.3.11 of pppd (includes also chat and
pppstats). Version 2.3.11 is last in 2.3 branch (last which
supports BSD systems from box). Base system contains version
2.3.5 which is waaay outdated. Port is called pppd23 to
distinct from possibly following port for 2.4.*.
It seems that almost all PRs for basesystem pppd are fixed in
Submitted by: Valentin Nechayev <email@example.com>