don't compile pfkey*, since we expect tons of changes in the near future.
bump shlib major (due to less exported APIs than before - am I correct here?).
- parser now uses yacc/lex (there'll be no symbol conflict).
- outbound policy and inbound policy is now separate
- policy specification for tunnel SA is improved
- api changed, bump shlib major
XXX some of programs will become not buildable - will commit shortly
