HSTS changes to staging
HSTS changes to staging

- config/environments/staging.rb - set config_ssl to true and
  set 'X-Content-Type-Options' to 'nosniff'

Updates #1268

BOWiki/BOW,EBWiki/EBWiki,EBWiki/EBWiki,BOWiki/BOW,BOWiki/BOW,EBWiki/EBWiki,EBWiki/EBWiki