[feature] Cconfigure mail relay
[feature] add myhostname
[feature] add certificate gmail
[feature] add logic for custom bind dns
[feature] add translations
[feature] add validations for server dns
[feature] delete validation differents dns's
[feature] add audit export to csv
Merge remote-tracking branch 'origin/master_feature_audit_export_to_csv' into 3.5
Merge remote-tracking branch 'origin/master_feature_configure_mail_relay' into 3.5
Merge remote-tracking branch 'origin/master_feature_bind_dns' into 3.5

Conflicts:
	app/models/configuration.rb
	app/views/configurations/_configuration.html.erb
	config/locales/en.activerecord.yml
	config/locales/es.activerecord.yml
	config/locales/pt.activerecord.yml
[feature] Improve translations, fix javascript syntax error on merge
Version Bump