known bugs and obsolete features of version 2.0-2.2

- Giulia Bellodi and Giovanni Rumolo report on irregular behavior with ibend=0, and recommend to use instead ibend=40 with bfield=0.0 (January 15, 2003)

- space-charge computation (using enscribed ellipse) and actual boundaries for LHC geometry (circle with flat cut off) are not fully consistent