gnu: Add foo2zjs.

* gnu/packages/cups.scm (foo2zjs): New variable.

gnu: Add foomatic-filters.

* gnu/packages/cups.scm (foomatic-filters): New procedure.

gnu: python2-acme: Remove package.

This package has not built successfully for a long time. Since it
appears to have no users, we remove it for now.

* gnu/packages/tls.scm (python2-acme): Remove variable.

gnu: tcpdump: Remove alternate source URL.

* gnu/packages/admin.scm (tcpdump)[source]: Remove alternate URL.

gnu: certbot, python-acme: Update to 0.18.1.

* gnu/packages/tls.scm (certbot, python-acme, python2-acme): Update to 0.18.1.

gnu: Add python-betamax-matchers.

* gnu/packages/python.scm (python-betamax-matchers, python2-betamax-matchers):
  New variables.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu: Add python-uritemplate.

* gnu/packages/python.scm (python-uritemplate, python2-uritemplate): New
  variables.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu: notmuch-addrlookup-c: Update to 8-1.88f156d.

* gnu/packages/mail.scm (notmuch-addrlookup-c): Update to 8-1.88f156d.
[source]: Use git-fetch.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu: neomutt: Update to 20170907.

* gnu/packages/mail.scm (neomutt): Update to 20170907.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

build: Use -Wmacro-use-before-definition.

* build-aux/compile-all.scm (warnings): Add 'macro-use-before-definition'.

gnu: hwloc: Update to 1.11.8.

* gnu/packages/mpi.scm (hwloc): Update to 1.11.8.

gnu: linux-libre@4.9: Update to 4.9.48.

* gnu/packages/linux.scm (linux-libre-4.9): Update to 4.9.48.

gnu: linux-libre@4.4: Update to 4.4.87.

* gnu/packages/linux.scm (linux-libre-4.4): Update to 4.4.87.

tests: Fix incorrect use of 'file-append'.

Fixes a regression introduced in fbc7b1f12561159e0ec3f6459d336f95cf2ce503.

* gnu/tests/install.scm (run-install)[install]: Don't use 'file-append'
with a string as its first argument; use a gexp with 'string-append' instead.
Use a gexp instead of a list for "-cdrom IMG".

gnu: elogind: Use itself as the cgroup controller.

Fixes a regression introduced in
fa67d5654176b4b815832eaf259188e1486c65ab whereby elogind would fail to
start with:

  Cannot determine cgroup we are running in: No data available
  Out of memory.

thereby preventing log-in altogether.

* gnu/packages/freedesktop.scm (elogind)[arguments]: Pass
"--with-cgroup-controller=elogind".
* gnu/tests/desktop.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

services: elogind: Add default value.

* gnu/services/desktop.scm (elogind-service-type)[default-value]: New
field.

marionette: 'wait-for-file' can be passed a read procedure.

* gnu/build/marionette.scm (wait-for-file): Add #:read parameter and
honor it.
* gnu/tests/base.scm (run-basic-test)["login on tty1"]: Use
'wait-for-file' instead of inline code.

gnu: elogind: Remove unnecessary configure flag.

* gnu/packages/freedesktop.scm (elogind)[arguments]: Remove
"--with-libcap" configure flag, which is no longer needed.

doc: Update elogind URL.

* doc/guix.texi (Desktop Services): Update elogind URL.

gnu: tcpdump: Update to 4.9.2 [security fixes].

Fixes CVE-2017-{12893,12894,12895,12896,12897,12898,12899,12900,12901,12902,
12985,12986,12987,12988,12989,12990,12991,12992,12993,12994,12995,12996,12997,
12998,12999,13000,13001,13002,13003,13004,13005,13006,13007,13008,13009,13010,
13012,13013,13014,13015,13016,13017,13018,13019,13020,13021,13022,13023,13024,
13025,13026,13027,13028,13029,13030,13031,13032,13033,13034,13035,13036,13037,
13038,13039,13040,13041,13042,13043,13044,13045,13046,13047,13048,13049,13050,
13051,13052,13053,13054,13055,13687,13688,13689,13690,13725}.

* gnu/packages/admin.scm (tcpdump): Update to 4.9.2.
[source]: Remove patches and add alternate source URL.
* gnu/packages/patches/tcpdump-CVE-2017-11541.patch,
gnu/packages/patches/tcpdump-CVE-2017-11542.patch,
gnu/packages/patches/tcpdump-CVE-2017-11543.patch: Delete files.
* gnu/local.mk (dist_patch_DATA): Remove them.