Give access to user emails for moderators

[CharlesNepote]

Rationale: moderators are experienced contributors or have been chosen because they are people of trust. They help admins to moderate content but currently they can't contact users to explain them good practices.

Technically

Seems easy technically, @alexgarel told me: In user_profile.tt.html

[% IF admin %]
	<p>Email: [% email %]</p>
[% END %]

should be replaced by:

[% IF moderator %]
	<p>Email: [% email %]</p>
[% END %]

Legally

Open Food Facts should provide guidelines for the moderators to follow appropriated behavior. For the moment we have this documentation:

• https://wiki.openfoodfacts.org/Moderation_Team
• https://wiki.openfoodfacts.org/Admin_rights
• https://wiki.openfoodfacts.org/Answering_questions (which could help)
• Communication Guidelines when speaking on behalf of Open Food Facts

Should they sign a document to engage themselves not to use these email addresses out of the purpose of moderation discussions?