Disable HEAD requests to info/refs
https://sentry.gitlab.net/gitlab/gitlabcom/issues/562013/ ``` JWT::DecodeError: Nil JSON web token jwt.rb:120:in `decode' raise(JWT::DecodeError, 'Nil JSON web token') unless jwt gitlab/workhorse.rb:193:in `decode_jwt' JWT.decode( gitlab/workhorse.rb:189:in `verify_api_request!' decode_jwt(request_headers[INTERNAL_API_REQUEST_HEADER]) workhorse_request.rb:13:in `verify_workhorse_api!' Gitlab::Workhorse.verify_api_request!(request.headers) active_support/callbacks.rb:432:in `block in make_lambda' lambda { |target, _, &blk| target.send filter, &blk } ... (128 additional frame(s) were not displayed) JWT::DecodeError: Nil JSON web token ```
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