[tor-relays] Estimation of bridge traffic / Bridge or relay needed?

[grarpamp]

> https://www.torproject.org/docs/faq#RelayOrBridge
>
> "If you have lots of bandwidth, you should definitely run a normal relay.
> If you're willing to be an exit, you should definitely run a normal
> relay, since we need more exits. If you can't be an exit and only have a
> little bit of bandwidth, be a bridge. Thanks for volunteering!"

The 'normal's above are ambiguous and conflicting.
Replace them with 'non-exit' and 'exit'.