Merge from origin/emacs-26

Merge from origin/emacs-26

2efd400 (origin/emacs-26) Correct typo in GNU ELPA url
6239016 * doc/misc/dired-x.texi (Omitting Variables): Fix wording. (B...
1531bca Fix help-form binding in dired-create-files
cf79327 Fix a pasto in a Gnus doc string
a4e40f6 ; * doc/emacs/files.texi (Reverting): Improve wording in last...
f632ecb Update revert-buffer documentation
eb67689 * lisp/mail/smtpmail.el (smtpmail-send-queued-mail): Load fil...
433e364 ; * etc/NEWS: Announce that emacs-module.h is now installed.

# Conflicts:
#	lisp/mail/smtpmail.el