Add $id parameter to get_the_tag_list() for consistency with...

Add $id parameter to get_the_tag_list() for consistency with get_the_(category|term)_list(). Props kawauso. Fixes #20072.

Also remove 'default' value of 0 for $id parameter in generic taxonomy functions
as it is a required parameter, and fix a notice when get_the_terms() is called
when $id = 0 and the $post global is not an object.


git-svn-id: https://core.svn.wordpress.org/trunk@20549 1a063a9b-81f0-0310-95a4-ce76da25c4cd