make bb_new_user() pluggable

[so1o]

the new user creation process is currently very rigid and cannot be overridden without making changes to the core files.

Relation Discussion

any other ideas guys.. im running out of steam here..

I would probably just put bb_create_user() in bb-includes/pluggable.php so that it can be replaced by a plugin rather than using a filter to accomplish that. We only need it to be replaced by one function, we don't need the ability to hook many functions onto the filter.

Also, does bb_new_user() ever need to return both the user_id and the password? I'd rather it only returned the user_id even when BB_INSTALLING. We can rewrite the install script to take advantage of the bb_new_user hook to grab the password.

if we put it in pluggable.. nope we wouldnt need to return the username and pass

pluggable bb_new_user and change to return user_id always

how does this look..

Looks great!

(In [638]) pluggable bb_create_user() from so1o. Fixes #495.