2. <libc.h> now defines Runeerror as 0xFFFD, the new official
Unicode error value. We used to use 0x80, but the rest of the
world standardized on 0xFFFD.
i know i've posted this before, but it's just a simple filter to debug rune encoding woe:
http://www.insultant.net/code/plan9/vr.c
-- MGRS 31U DQ 52572 12604
