"locale"

fscanf

vsnprintf return value should be the number of needed characters instead
of the (truncated) number of characters that were actually written.

real regerror

real DNS errors (gai_strerror,hstrerror,...)

Try to improve code size and quality with __restrict__.

FPU exception handling (for mawk)

res_mkquery should not assume op is QUERY

logging.

new stdio.

test .*scanf functions ....

EINTR handling (*puke*).  What about EAGAIN?

bizarre printf bullshit: "%8.7lx",0xfefe should yield " 000fefe"?!