Option of "action" with value "update" is being added to options table

[markjaquith]

the hidden form field on wp-admin/options.php with name "action" and value "update" is causing an option of that name and value to be added to the options table. Oops!

[markjaquith]

Kill the "action" option

[markjaquith]

Fix unsets $_POST$wpvar?; in the "WP vars to set" loop. Anything that we're running through this loop (only "action") we don't want showing up as an option.

People who already have it added are stuck with it, but it'd be silly to write code to remove it... it does no harm.

[markjaquith]

New patch adds 'Update' to the list of things to reset, as the submit button was being added to the Options table as well.

[markjaquith]

Related (duplicate?): #3185

[markjaquith]

(In [4332]) Prevent non-option form elements from sneaking in to the options table. fixes #2595

[markjaquith]

(In [4333]) Prevent non-option form elements from sneaking in to the options table. fixes #2595