9fs sources

I have finally got an account in sources (thanks Geoff!). ATM, it contains my patched versions of rio and acme and some rc functions:

; 9fs sources
; cd /n/sources/contrib/yiyus
; cat INDEX
cmd/acme/: patched acme (see README)
cmd/rio/: patched rio (see README)
rc/fns: collection of rc functions

Of course, any comments are appreciated. Enjoy.