net/dict: parse response correctly + typo
net/dict: parse response correctly + typo

* SHOW DB responds with a
  "110 n databases present - text follows" -- parse it.
* Doing a Define() on a non-existing word gives error
  "invalid definition count: no", when we really
  want "552 no match".

R=rsc
CC=golang-dev
http://codereview.appspot.com/2211041

Committer: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>

gnanderson/go,dsriram/golang,tv42/old-go,h8liu/golang,h8liu/golang,tv42/old-go,apparentlymart/golang,tv42/old-go,ssrl/go,tv42/old-go,ssrl/go,apparentlymart/golang,dsriram/golang,dsriram/golang,ssrl/go,gnanderson/go,pombredanne/go-deleteme,pombredanne/go-deleteme,ssrl/go,gnanderson/go,gnanderson/go,ssrl/go,dsriram/golang,apparentlymart/golang,pombredanne/go-deleteme,pombredanne/go-deleteme,apparentlymart/golang,tv42/old-go,h8liu/golang,dsriram/golang,h8liu/golang,pombredanne/go-deleteme,apparentlymart/golang,ssrl/go,pombredanne/go-deleteme,h8liu/golang,pombredanne/go-deleteme,dsriram/golang,gnanderson/go,tv42/old-go,h8liu/golang,h8liu/golang,apparentlymart/golang,dsriram/golang,gnanderson/go,apparentlymart/golang,ssrl/go,gnanderson/go,tv42/old-go