Edit-tags generates incorrect links for taxonomies and categories

[gortsleigh]

In the "posts" column of the table of tags, wp-admin/edit-tags.php generates links with the attribute 'tag=' regardless of the taxonomy being edited. For anything other than post tags, this is incorrect.

The fix is in the attached patch.

For post tags, the patch generates links as before, like

edit.php?tag=my-tag-value

For categories, it generates links of the form

edit.php?cat=162

For custom taxonomies, it uses the taxonomy (for example, an Artist taxonomy):

edit.php?artist=alison-krauss

[ryan]

(In [11478]) Generate correct links for custom taxonomies. Props gortsleigh. fixes #9967