Fix docs about stats option

[sh92]

I think the option about stats is outdated. Thx.

[undingen]

good catch 👍, thanks for the change!

Could you please remove the libunwind commit it's causing the travis-ci error 😒 .
Unfortunately our build system currently applies some patches to libunwind (libunwind_patches/*) and git commits them during the build which causes cause libunwind to change - which means we normally never want to actually commit this changes because the revision will only exist on you host locally which causes the travis-ci error.

I have seen that there is another '-s' in README.md: -s Print out the internal stats at exit. could you change change that one too.

And would you mind signing the the CLA please: https://opensource.dropbox.com/cla/
I don't think it's absolutely necessary for this change but would be nice to have for the future :-)
Sorry for all my requests 😛

[sh92]

OK, I fix it. This is my first project. I want to learn a lot in this project. Thank you for review. But I don't know how to sign the CLA? I failed to open the website when I clicked.

[undingen]

thanks for your patch 👍
I notified colleagues of mine to take a look into why the CLA site is down but I merged this in because it is a very small change. But if you plan to submit future PRs (please do 😄 ) you will have to sign it please.