DHCP client and server, from Ashwini Sharma.
Forgot to check in toys.h when generated/oldtoys.h went in. (Oops.)
Normalize df menu entry and tweak help text.
su: cleanery

* make help message more like others
* s/TT\.(.)Argu/TT.\1/g
* move environ to toys.h
* simplify failure messages
* clear password before quit
* not check what execve returns
* -lc
cut tests from Kyungwan Han.
Cleanup du.
Remove files du no longer needs.
Fix usage: lines for a couple commands.
Whitespace changes to passwd.
Fix wrong printf type.
Document the toybox entry path from main() into a command.
Use OPTSTR_command macro for more oldtoys, to avoid keeping two option strings in sync. (todo: figure out how to make OLDTOY() automatically use macro. Still need the raw version for subset ala cp/mv though.)
Finish grep rewrite and fleshing out test suite. Several of the grep tests fail with the ubuntu version, I _think_ these are upstream bugs? (Second opinions welcome...)
Move grep from pending to posix, switch default to y.