New actionhook bp_send_mail

[mahype]

At the moment it is not possible to change email content before sending depending on who is the recipient, because there is no actionhook. In the added diff I added one.

[mahype]

Actionhook bp_send_email

[mahype]

Added $args to arguments

[r-a-y]

It's possible to modify the email post object on the 'bp_email_validate' filter with the second BP_Mail parameter, but I'll let @djpaul chime in here.

[mahype]

There is an actionhook, but it's no reference. Also I would say this would be a very hidden way to offer the people an influence to the content of the email. I not came on the idea to look at this part of the code.

[DJPaul]

I like the idea of having a dedicated action for this; it'll protect the use case if that validate filter ever changes its purpose. (I also think that in the validate filter's case, the email object isn't changeable by reference).

[djpaul]

In 11401:

Emails: add action before email is validated and sent.

Allows third-party plugins to customise the email after BuddyPress has built it.

Fixes #7427

Props mahype