gnu: Remove duplicate definition of emacs-esxml.

* gnu/packages/emacs.scm (emacs-esxml): Remove.

gnu: Remove emacs-nov.

The package already exists with the name "emacs-nov-el".

* gnu/packages/emacs.scm (emacs-nov): Remove.

gnu: emacs-org, emacs-org-contrib: Update to 20180226

* gnu/packages/emacs.scm (emacs-org):
(emacs-org-contrib): Update to 20180226, aka Org 9.1.7.

gnu: Add emacs-nov.

* gnu/packages/emacs.scm (emacs-nov): New variable.

gnu: Add emacs-esxml.

* gnu/packages/emacs.scm (emacs-esxml): New variable.

gnu: emacs-ahungry-theme: Update to 1.10.0.

* gnu/packages/emacs.scm (emacs-ahungry-theme): Update to 1.10.0.

Signed-off-by: Marius Bakke <mbakke@fastmail.com>

gnu: Add emacs-sly.

* gnu/packages/emacs.scm (emacs-sly): New variable.

gnu: Add emacs-edit-indirect.

* gnu/packages/emacs.scm (emacs-edit-indirect): New public variable.

gnu: Add emacs-polymode.

* gnu/packages/emacs.scm (emacs-polymode): New variable.

gnu: emacs-slack: Update to 0-2.02ee1d73.

* gnu/packages/emacs.scm (emacs-slack): Update to 0-2.02ee1d73.

Merge branch 'master' into core-updates

gnu: Add emacs-nov-el.

* gnu/packages/emacs.scm (emacs-nov-el): New variable.

gnu: Add emacs-esxml.

* gnu/packages/emacs.scm (emacs-esxml): New variable.

Merge branch 'master' into core-updates

gnu: Use HTTPS for supported nongnu.org home pages.

* gnu/packages/acl.scm (acl)[home-page]: Use HTTPS.
* gnu/packages/admin.scm (dmidecode)[home-page]: Likewise.
* gnu/packages/attr.scm (attr)[home-page]: Likewise.
* gnu/packages/audio.scm (lash)[home-page]: Likewise.
* gnu/packages/avr.scm (avr-libc)[home-page]: Likewise.
* gnu/packages/backup.scm (rdiff-backup, libchop)[home-page]: Likewise.
* gnu/packages/compression.scm (fastjar, lzip, lziprecover, atool)
(lunzip, clzip, lzlib, plzip)[home-page]: Likewise.
* gnu/packages/emacs.scm (geiser, bbdb, m17n-lib, m17n-lib)[home-page]:
Likewise.
* gnu/packages/flashing-tools.scm (avrdude)[home-page]: Likewise.
* gnu/packages/fontutils.scm (libotf)[home-page]: Likewise.
* gnu/packages/game-development.scm (gzochi)[home-page]: Likewise.
* gnu/packages/games.scm (enigma)[home-page]: Likewise.
* gnu/packages/gsasl.scm (libntlm)[home-page]: Likewise.
* gnu/packages/gtk.scm (guile-cairo)[home-page]: Likewise.
* gnu/packages/guile.scm (guile-reader, guile-lib, guile-json)
(guile-redis, g-wrap)[home-page]: Likewise.
* gnu/packages/libunwind.scm (libunwind)[home-page]: Likewise.
* gnu/packages/lout.scm (lout)[home-page]: Likewise.
* gnu/packages/mpd.scm (sonata)[home-page]: Likewise.
* gnu/packages/networking.scm (quagga)[home-page]: Likewise.
* gnu/packages/ratpoison.scm (ratpoison)[home-page]: Likewise.
* gnu/packages/skribilo.scm (skribilo)[home-page]: Likewise.
* gnu/packages/telephony.scm (exosip)[home-page]: Likewise.
* gnu/packages/texinfo.scm (texi2html)[home-page]: Likewise.
* gnu/packages/xdisorg.scm (xbindkeys)[home-page]: Likewise.

gnu: Add epipe.

* gnu/packages/emacs.scm (epipe): New public variable.

gnu: Add emacs-scratch-el.

* gnu/packages/emacs.scm (emacs-scratch-el): New public variable.

gnu: magit: Do not set 'magit-git-executable' to absolute file name.

Fixes <https://bugs.gnu.org/30434>.
Reported by Ricardo Wurmus <rekado@elephly.net>.

* gnu/packages/emacs.scm (magit)[arguments]: Do not modify the default value
of 'magit-git-executable'.  Remove "#:modules" and "#:imported-modules".

gnu: magit: Do not set 'magit-git-executable' to absolute file name.

Fixes <https://bugs.gnu.org/30434>.
Reported by Ricardo Wurmus <rekado@elephly.net>.

* gnu/packages/emacs.scm (magit)[arguments]: Do not modify the default value
of 'magit-git-executable'.  Remove "#:modules" and "#:imported-modules".

Merge branch 'master' into core-updates