sort: use noted(NDFLT) in note handler There are many more random notes flying around here in Unix-land than there were on Plan 9. For example, some shells implement "cat file | sort" with cat as the child of sort, so that when cat exits, sort gets a "sys: child" note. noted(NDFLT) knows which signals aren't really important and can be ignored, and which need to kill the program.

Use gcc -ansi -pedantic in 9c. Fix many non-C89-isms.

bigger chunking

Many small edits.

new utilities. the .C files compile but are renamed to avoid building automatically.