DefaultAvatarLink the default avatar link.

GenerateEmailAvatarFastLink returns a avatar link (fast, the link may be a delegated one: "/avatar/${hash}").

GenerateEmailAvatarFinalLink returns a avatar final link (maybe slow).

GenerateUserAvatarFastLink returns a fast link (302) to the user's avatar: "/user/avatar/${User.Name}/${size}".

GenerateUserAvatarImageLink returns a link for `User.Avatar` image file: "/avatars/${User.Avatar}".

GetEmailForHash converts a provided md5sum to the email.

HashEmail hashes email address to MD5 string.

LibravatarURL returns the URL for the given email.

DefaultAvatarClass is the default class of a rendered avatar.

DefaultAvatarPixelSize is the default size in pixels of a rendered avatar.

EmailHash represents a pre-generated hash map (mainly used by LibravatarURL, it queries email server's DNS records).