Add new setting for Password Reset policy (Azure AD B2C).

[lasyan3]

Add support for Azure AD B2C Password Reset policy.

[lasyan3]

To @daggerhart : first, thanks for this very useful plugin! About this pull request: I realize its purpose is for a very specific solution using OpenId Connect protocol (Azure Active Directory B2C), so I would understand if you don't want to pull this request (to keep the project "generic"). Do you think a better approach would be to fork your project to a new one, dedicated to Azure AD B2C? I'm open to suggestion :)
Again, thanks for your work!

[daggerhart]

@lasyan3 I don't mind offering some means for you to use Azure Active Directory with this plugin, so you wouldn't have to maintain a fork.

I'll review the PR this evening or tomorrow morning and let you know what I think.

[timnolte]

@lasyan3 since the plugin provides methods for adding custom options it would seem like these options could be maintained separately as an add-on of sorts. I think it is wise to keep this plugin on the generic side out-of-the-box but then providing instructions or add-ons for specific integrations would be good.