List instances and emails where username should be replaced by real name

[frans]

Token replacement for user related tokens is written, but restricted to the registration case at the moment, it could be made global, but maybe better (?) to look at each individually - so as not to accidentally break anything with something that looks like a token?

List outgoing e-mails that want token replacement - and note if they want something other than user related tokens.

[kester]

Confirmed -- Outgoing e-mail does not contain realname (token). Elsewhere theme('username') is correct.

[kester]

Permissions were set so anonymous users can't use 'realname' so even if this was going through theme() function it wouldn't have replaced realname at this stage.

The navigation bar (core one) also doesn't use theme(username) it seems.

[kester]

r599 fixes this case.

[kester]

But as they will be related patches keeping this ticket open and re-writing it for other outgoing e-mails.

[pelle]

Look for instances where the username is shown instead of the Real Name