sharness/lib: fix daemon startup check

Go back to test_run_repeat_10_sec to make sure the API
is there. I think this is also clearer on the reader.

test/sharness: improve t0111 using test_cmp

License: MIT
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>

sharness/lib: fixing gateway addr check

test/sharness: improve t0090 by using printf

seems that the previous way isnt liked by all platforms

License: MIT
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>

cat length output now uses unixfs size

there's an odd error setting the config.

unixfs file size != merkledag cumulative size

Since the DagReader has lots of useful information (like sizes etc)
it's good to be able to use it.

test/sharness: improve t0080

The following changes are made to make t0080
cleaner, safer and more canonical:

- remove useless stuff,
- don't use a pipe after ipfs commands,
- use test_must_fail before ipfs commands instead of !

License: MIT
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>

multiaddrs with .../ipfs/...

and do it both online + offline

⚠ this commit makes your current configs unusable, as the
default bootstrap peers. You may need to edit your config.

Go from:

```js
Bootstrap: [
  {
    "Address": "/ip4/104.131.131.82/tcp/4001",
    "PeerID": "QmaCpDMGvV2BGHeYERUEnRQAwe3N8SzbUtfsmvsqQLuvuJ"
  }
]
```

To:
```js
Bootstrap: [
  "/ip4/104.131.131.82/tcp/4001/ipfs/QmaCpDMGvV2BGHeYERUEnRQAwe3N8SzbUtfsmvsqQLuvuJ"
]
```

misc fixes: hanging connects + test output

http://gifs.gifbin.com/012011/1295375531_cat-jump-fail.gif

sharness fixes - gateway and more

Not sure why this fd redirect was here. Is it necessary?
Tests seem to pass for me.

cc @mildred