[1.6.x] Fixed #23665 -- Noted precedence of settings.USE_L10N in MONTH_DAY_FORMAT and YEAR_MONTH.

Backport of 4f90c99635149fae2f488c03f0b52303fe97e0aa from master
[1.6.x] Fixed #23793 -- Clarified password reset behavior in auth docs

Backport of c5132382f081bd1b5a3618bbf23fa0cf720af14b from master.