- in 9front, the bootargs are in the form: method!device args
- remove redundant and wrong paragraphs regarding tcp booting
- document il boot method
- fix boot and bootrc confusions
boot(8) claims that boot will launch /$objtype/init;
that is incorrect. It launches /$cputype/init (so says
both boot.c and cpurc(8)). That's the more sensible
choice. This patch fixes the man page to resolve the
mismatch.