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.