Password settings

A series of settings are configurable for the built-in authentication method:

PATCH /api/v2/config/auth
{
    "maxFailedLoginAttempts": 5,
    "failedLoginAttemptsTTL": 300,
    "userCacheTTL": 500,
    "maxUserSessionDuration": 2592000,
    "passwordRegex": "^[A-Za-z0-9!@#$%^&*()_+\\-=\\[\\]{};:<>,.?/|~`]+$",
    "passwordMonthsValidity": 3
}