Allow moderators to view topic/reply author IP addresses on the front end

[netweb]

Currently a bbPress moderator cannot view a users IP address on the front end, only keymasters can

e.g. ​https://bbpress.trac.wordpress.org/browser/trunk/src/templates/default/bbpress/loop-single-reply.php#L43

Moderators can view a user IP in the back end though.

We should change this to standardise that front and back ends are the same, proposing we change the checks in the template loops from bbp_is_keymaster to bbp_is_user_forum_moderator

[netweb]

Related: #2908

[netweb]

Related: ​#meta1923

[netweb]

Related: ​https://meta.trac.wordpress.org/changeset/4122 ​https://meta.trac.wordpress.org/changeset/4124

[johnjamesjacoby]

In 6223:

Moderators: Allow moderators to see topic/reply author IP addresses.

Fixes #2975.