add "orderby" parameter to "wp_list_authors()" function

[ramiy]

the wp_list_categories() function has a very useful "orderby" parameter that receives the following:

• ID
• name - Default
• slug
• count
• term_group

i want to add "orderby" parameter to wp_list_authors() function that will receive the following:

• ID
• name - Default
• count

patch based on some other function...

i added 2 parameters:

sort_column :

• ID
• user_login
• user_nicename
• display_name - default

sort_order :

• ASC - default
• DESC

This is not the best solution but it's easy to use.

parameter names changed to $orderby and $order

orderby :

• ID
• user_login
• user_nicename
• display_name - default

order :

• ASC - default
• DESC

$orderby and $order need to be validated. See how get_terms() does it.

with parameter validation

Looks good, but all enhanements are being postponed from 2.9. Let's commit this early in the 3.0 cycle.

#10329 should be closed as a duplicate or vice versa.