This should enable proxy fetching through proxy and allow SSL disable for such tasks when the environment requires.
New settings have been added to the Environment in order to properly configure such feature. Please, extra feedback on the translations would be nice as I'm not 100% sure about them.
For full context please have a look at: https://softwarepublico.gov.br/gitlab/noosferogov/noosfero/issues/160
Here is a link to travis' build: https://travis-ci.org/rafamanzo/noosfero/builds/121927423