2021-06-04
	Start this changelog.
	Comment cleanup.
	Minor letterform tweaks: K[]{}
	Add man page and distribution targetrs.
	Add mkfile.p9p (but you'll still need to do String.h→libString.h manually).
2021-07-06
	Minor letterform tweaks: Zz
	Make the code more ideomatic, including adding a usage message.
	Make length configurable on the command line.
	Ignore (rather than crash on) characters above what we've defined.
	Fix up comments.