Filters to change IM names

[Txanny]

In some blogs, we need to change the IM labels to be shown to administrators and users when editing user profiles. Now we have just the posibility to have AIM, Yahoo or Jabber IM adresses, but some times this are just not the ones our users are using.

For example, we want to have Windows Live, Skype and Google Talk.

One way is to change it on the translations files, but this is just we are using a translation and have to remember to change it every time we update our WordPress.

So, this enhancement proposes to create 3 new filters just for this labels. So we can change them via a filter in our theme or plugin.

The 3 new proposed filters are 'user_label_aim', 'user_label_yahoo' and 'user_label_jabber'.

Patch is provided for this enhancement.

New filters for custom labels on user profile.

(In [10819]) Filters for IM names in user profile, props Txanny, fixes #9357