Add action hook to end of resetpassform reset_pass_form

[romaimperator]

Description

This hook will allow plugin developers to add content to the form users see when they are setting a new password for their account.

Why do I want this feature?

My plugin found ​Here replaces the need for passwords. I added a feature to allow users to completely disable password logins for their account to prevent bruteforcing. This hook will allow me to add a feature which will let them assign a new TrustAuth key (just a public key) to their account rather than forcing them to reenable password logins and set a new password.

Current Behavior

Currently plugins cannot add anything to the form.

Implementation Strategy

I have created a patch which simply runs the action hooks before outputting the submit tag.

Work Estimate

However long it takes to review this ticket and apply my patch.

Commitments

me, romaimperator, implementing the one line of code

[romaimperator]

feature patch

[nacin]

In 27068:

New resetpass_form hook in wp-login.php.

props romaimperator.
fixes #21044.

[nacin]

Sorry for the delay on this one, romaimperator.

[DrewAPicture]

In 28017:

Improve hook docs for the resetpass_form hook added in 3.9.

See #21044, #27700.