required to avoid an extra https->http->https redirect, should increase
performance and allow use without the need to open port 80

requires gen_passwd module

import suggestion from @edoput:
"al massimo posso capire un filtro come | bool"
FB PM 17/11/2016 00:22

number of worker: "lascierei stare questa cosa del numero di worker"
disable gzip for msie6: "questa la rimuovi tanto non ci interessa"

on facebook PM 17/11/2016 00:22

necessary to avoid nginx startup failure

only if letsencrypt_pause is true

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