[9fans] a faster contrib(1)

["Federico G. Benavento" <benavento@gmail.com>]

hola,

we've been thinking about making contrib faster for some time
now and we finally got something significantly speed improvemnets.

It still uses replica but instead of pulling from sources, it grabs a
.iso.bz2 for the package, mounts it and pulls from there (locally), the
old behaviour is still supported, in fact if the iso.bz2 isn't found
it falls back to the old behavior.

pushes are still slow as it maintains the old behavior of updating
/n/sources/contrib/$usr/root/ so you don't loose the ability of
diffing code against sources.

I'll upload it in a bit, but I'd like to hear if you have any comments first

old:
0.61u 7.03s 4600.28r     contrib/install fgb/openssl

new:
2.91u 6.06s 55.37r       contrib/install fgb/openssl


--
Federico G. Benavento