* lisp/ox-org.el (org-org-identity, org-org-template): As it has
previously been clarified on the mailing list that upper-case keywords
are only intended for the manual[1], an Org export of an Org file should
use lower-case keywords.
[1]: https://list.orgmode.org/87tuuw3n15.fsf@nicolasgoaziou.fr/