Add $default to pre_option_{$option} filter

[sc0ttkclark]

Currently the pre_option_{$option} filter passes two options:

	/**
	 * Filters the value of an existing option before it is retrieved.
	 *
	 * The dynamic portion of the hook name, `$option`, refers to the option name.
	 *
	 * Passing a truthy value to the filter will short-circuit retrieving
	 * the option value, returning the passed value instead.
	 *
	 * @since 1.5.0
	 * @since 4.4.0 The `$option` parameter was added.
	 *
	 * @param bool|mixed $pre_option Value to return instead of the option value.
	 *                               Default false to skip it.
	 * @param string     $option     Option name.
	 */
	$pre = apply_filters( "pre_option_{$option}", false, $option );

What I believe that is needed here is to add $default as well, which could be valuable to the callback hooking in (assuming $default is not false in those use cases).

[sc0ttkclark]

Example use case:

I want to override certain options (from a plugin) for sites on a multisite install to use an option that is instead network-wide.

[DrewAPicture]

I'm on board with this. Having access to the value of $default here would be useful, and actually also in the pre_site_option_{$option} hook as well.

[DrewAPicture]

In 41013:

Options: Pass $default as a new parameter to the pre_option_{$option} and pre_site_option_{$option} filters.

This change standardizes some language in the parameter descriptions between the two hook docs in an effort to reduce confusion between the $pre_option pseudo-parameters and the new $default ones. $pre_option is the truthy value used to short-circuit the get_*option() call, $default is the value passed to the get_*option() returned in the event that 1) a short circuit isn't performed, 2) the option doesn't exist.

Props sc0ttkclark.
Fixes #41254.

[johnbillion]

In 41617:

Options, Meta APIs: Require a confirmation link in an email to be clicked when a user attempts to change the network
admin email address on Multisite.

This mirrors the same functionality for the site admin email address and user profile email address.

Fixes #41254

[ramiy]

Good change but not consistent greeting. We usually start email with "Hi", not "Howdy".

Source: ​https://translate.wordpress.org/projects/wp/dev/he/default?filters%5Bterm%5D=%23%23%23&filters%5Buser_login%5D=&filters%5Bstatus%5D=current_or_waiting_or_fuzzy_or_untranslated&sort%5Bby%5D=original&sort%5Bhow%5D=asc&sorts=Sort