Change license to BSD about snappy HOT 12 CLOSED

Apache license is actually one of the things we really like about Snappy. If 
you must change it, maybe go with something hyper-compatible?

Change is too strong of a word. A dual license should work too.

What do you want to use Snappy for? Dual-licensing can be a bit tricky, so we 
generally try to avoid it.

I've been planning to compressing various caches in mozilla to reduce disc IO 
lag. Snappy seems like it will fit the bill perfectly.

I'd like to use it in the Linux kernel together with zram (which currently uses 
LZO). For that, AFAIK, it needs a GPL2-compatible license.

Okay, sounds good.

Sounds fine to me

OK, we've changed the license to a BSD-type license. r20 contains the code 
updates.

Many files still have a header that says "Apache License". Please update all 
files. Thank you.

Fixed in r21.