noosfero | profile: be case insensitive on urls (#615)

[Antonio Terceiro]

New comment for Merge Request 615

https://gitlab.com/noosfero/noosfero/merge_requests/615#note_1541148


Antonio Terceiro

I would rather handle this in the not found handler instead of just accepting all requests, using something like

```ruby
if params[:profile] && params[:profile].downcase != params[:profile]
  redirect_to url.merge(profile: params[:profile].downcase) 
end
```

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