Password policy checks that fail and have `suggestChangeOnLogin` set to true will
prompt for a password change on login.
Below are some rules that apply to this setting in different scenarios:
- If only one policy fails and has `suggestChangeOnLogin = false`, a password change will
not be requested
- If more than one policy fails and one or more have `suggestChangeOnLogin` set to true`,
a password change will be requested
- If `forceChange` is present in any of the failing policies, `suggestChangeOnLogin` value
will be ignored and password change will be enforced
- if $wgInvalidPasswordReset is set to false `suggestChangeOnLogin` is ignored
IMPORTANT**
Before this patch, suggesting a password change was the default behavior (depending on
$wgInvalidPasswordReset), which means that the necessary changes to $wgPasswordPolicy
need to be in place before this patch is merged and gets to production.
Bug: T211621
Change-Id: I7a4a0a06273fa4e8bd0da3dac54cf5a1b78bb3fd
Follow-up to I28c31fc4ea.
Also improves what policy values are considered disabled, documents
how to extend core checks/flags and adds a structure test for it.
Bug: T118774
Change-Id: I66bf396e8e8a8c310a47ba337abe9070e7e83ff6
