services: slim: Preserve the order of session types.

That makes WindowMaker the default session, by default.

* gnu/services/xorg.scm (xsessions-directory)[builder]: Prepend a number
  in the file name to preserve the order of SESSIONS.
  (slim-service): Augment docstring.
* doc/guix.texi (X Window): Adjust accordingly.

services: nscd: Make sure /var/db/nscd exists.

* gnu/services/base.scm (nscd-service)[activate]: Make /var/db/nscd.

services: lsh: Add graceful handling of daemonic option.

* gnu/services/ssh.scm (lsh-service): New #:keys (daemonic?, pid-file?,
  pid-file).  Build new lshd-command and expand service-requirement
  field.
* doc/guix.texi (Networking Services): Update accordingly.

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

services: xorg: Add Nouveau driver.

* gnu/services/xorg.scm (xorg-start-command)[xserver.conf]: Add
  XF86-VIDEO-NOUVEAU.

services: Add wicd service.

* gnu/services/networking.scm (wicd-service): New procedure.
* doc/guix.texi (Networking Services): Document it.

services: nscd-service: Add #:name-services parameter.

* gnu/services/base.scm (nscd-service): Add #:name-services parameter.
  In 'start' field, set LD_LIBRARY_PATH based on #:name-services.
* doc/guix.texi (Base Services): Document it.
  (Name Service Switch): Link to 'nscd-service'.

services: xorg: Add sawfish session.

* gnu/services/xorg.scm (%sawfish-session-type): New variable.
* doc/guix.texi (X Window): Mention it.

services: mingetty: Wait for udev.

* gnu/services/base.scm (mingetty-service): Add 'udev' to
  'requirement'.

services: xorg: Define the <session-type> record type.

* gnu/services/xorg.scm (<session-type>): New record type.
  (%windowmaker-session-type, %ratpoison-session-type): New variables.
  (%default-xsessions): Use them.
  (xsessions-directory): Expect SESSIONS to be a list of <session-type>
  and rewrite accordingly.
  (slim-service): Adjust docstring.
* doc/guix.texi (X Window): Update accordingly.

services: dbus: Set the search path for .service files.

* gnu/services/dbus.scm (dbus-configuration-directory)[services->sxml]:
  Produce a <servicedir> tag.

services: guix: #:authorize-hydra-key? now defaults to #t.

* gnu/services/base.scm (guix-service): Change AUTHORIZE-HYDRA-KEY?
  default value to #t.

monads: Move '%store-monad' and related procedures where they belong.

This turns (guix monads) into a generic module for monads, and moves the
store monad and related monadic procedures in their corresponding
module.

* guix/monads.scm (store-return, store-bind, %store-monad, store-lift,
  text-file, interned-file, package-file, package->derivation,
  package->cross-derivation, origin->derivation, imported-modules,
  compiled, modules, built-derivations, run-with-store): Move to...
* guix/store.scm (store-return, store-bind, %store-monad, store-lift,
  text-file, interned-file): ... here.
  (%guile-for-build): New variable.
  (run-with-store): Moved from monads.scm.  Remove default value for
  #:guile-for-build.
* guix/packages.scm (default-guile): Export.
  (set-guile-for-build): New procedure.
  (package-file, package->derivation, package->cross-derivation,
  origin->derivation): Moved from monads.scm.
* guix/derivations.scm (%guile-for-build): Remove.
  (imported-modules): Rename to...
  (%imported-modules): ... this.
  (compiled-modules): Rename to...
  (%compiled-modules): ... this.
  (built-derivations, imported-modules, compiled-modules): New
  procedures.
* gnu/services/avahi.scm, gnu/services/base.scm, gnu/services/dbus.scm,
  gnu/services/dmd.scm, gnu/services/networking.scm,
  gnu/services/ssh.scm, gnu/services/xorg.scm, gnu/system/install.scm,
  gnu/system/linux-initrd.scm, gnu/system/shadow.scm, guix/download.scm,
  guix/gexp.scm, guix/git-download.scm, guix/profiles.scm,
  guix/svn-download.scm, tests/monads.scm: Adjust imports accordingly.
* guix/monad-repl.scm (default-guile-derivation): New procedure.
  (store-monad-language, run-in-store): Use it.
* build-aux/hydra/gnu-system.scm (qemu-jobs): Add explicit
  'set-guile-for-build' call.
* guix/scripts/archive.scm (derivation-from-expression): Likewise.
* guix/scripts/build.scm (options/resolve-packages): Likewise.
* guix/scripts/environment.scm (guix-environment): Likewise.
* guix/scripts/system.scm (guix-system): Likewise.
* doc/guix.texi (The Store Monad): Adjust module names accordingly.

services: user-processes: Really honor the grace delay.

* gnu/services/base.scm (user-processes-service): Change #:grace-delay
  default value to 4.  Define 'sleep*' and use it.

Merge branch 'master' into core-updates

services: user-processes: Write debugging messages to the output port.

* gnu/services/base.scm (user-processes-service): Write "sending all
  processes..." message to the current output port, not to /dev/console.

Merge branch 'master' into core-updates

Merge branch 'xorg-updates'

Merge branch 'master' into core-updates

gnu: xorg-server: Update to 1.16.2.901, with many security fixes.

Includes fixes for CVE-2014-8091, CVE-2014-8092, CVE-2014-8093, CVE-2014-8094,
CVE-2014-8095, CVE-2014-8096, CVE-2014-8097, CVE-2014-8098, CVE-2014-8099,
CVE-2014-8100, CVE-2014-8101, CVE-2014-8102, and CVE-2014-8103.

See <http://www.x.org/wiki/Development/Security/Advisory-2014-12-09/>

* gnu/packages/xorg.scm (xorg-server): Update to 1.16.2.901.  Move mesa,
  resourceproto, scrnsaverproto, and xf86driproto from inputs to
  propagated-inputs.  Add dri3proto and presentproto to propagated-inputs.
  Add eudev and libxshmfence to inputs.  Add a 'pre-configure' phase instead
  of modifying the 'configure' phase.  Adapt substitution that avoids trying
  to 'mkdir /var' to build system changes.

* gnu/services/xorg.scm (xserver.conf): Add xf86-input-evdev ModulePath line.

gnu: xf86-video-modesetting: Now uses the same libdrm as mesa.

* gnu/packages/xorg.scm (xf86-video-modesetting): Remove a comment stating
  that the libdrm used in this driver is incompatible with the one in mesa,
  because it is no longer true.
* gnu/services/xorg.scm (xserver.conf): Uncomment 'xf86-video-modesetting'
  ModulePath and remove associated comment.