This fixes regressions introduced in de1c158f ("system: Add support for
boot-time mapped devices.").

* doc/guix.texi (Initial RAM Disk): Adjust example with custom use of
  'base-initrd'.  Document #:mapped-devices parameter of 'base-initrd'.
* gnu/system/vm.scm (system-disk-image, system-qemu-image,
  virtualized-operating-system): Adjust call to 'base-initrd' to new
  signature.

* doc/guix.texi (System Installation): Remove encrypted disks and swap
  from the limitations.

* doc/guix.texi (Mapped Devices): New subsection.

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

* doc/guix.texi (User Accounts): Add the "audio", "video", and "cdrom"
  groups in the example.

* gnu/system/linux-initrd.scm (expression->initrd): Remove #:linux and
  #:linux-modules parameters.  Remove call to
  'float-linux-module-directory'.
  (base-initrd): Add call to 'float-linux-module-directory'.  Use it in
  #:linux-modules argument in the gexp.  Remove #:linux and
  #:linux-modules arguments to 'expression->initrd'.
* gnu/build/linux-initrd.scm (build-initrd): Remove
  #:linux-module-directory parameter.  Don't create 'modules'
  sub-directory.
* gnu/build/linux-boot.scm (boot-system): Mentin that LINUX-MODULES is a
  list of absolute file names.  Don't prepend "/modules/" to
  LINUX-MODULES.
* doc/guix.texi (Initial RAM Disk): Adjust accordingly.

* gnu/system/linux-initrd.scm (expression->initrd): Remove #:to-copy
  parameter.  Remove 'graph-files', and adjust #:references-graphs
  arguments to just list INIT.
  (base-initrd): Remove #:to-copy argument.
* doc/guix.texi (Initial RAM Disk): Adjust accordingly.

Use "U" to upgrade the current package, "^" to upgrade all.

* emacs/guix-list.el: (guix-list-unmark): With prefix, mark all.
  (guix-package-list-mark-outputs): New procedure.
  (guix-package-list-mark-install, guix-package-list-mark-delete)
  (guix-package-list-mark-upgrade): Use it.
  (guix-package-list-mark-upgrades): New command.
* doc/emacs.texi (emacs List buffer): Update the manual accordingly.

* guix/gexp.scm (lower-reference-graphs): New procedure.
  (gexp->derivation)[graphs-file-names]: New procedure.
  Use 'lower-reference-graphs', and augment #:inputs argument as a
  function of #:references-graphs.
* doc/guix.texi (G-Expressions): Adjust 'gexp->derivation' documentation
  accordingly.
* tests/gexp.scm ("gexp->derivation, store copy"): Remove reference to
  TWO in BUILD-DRV.  Use TWO directly in #:references-graphs argument.
  ("gexp->derivation #:references-graphs"): New test.
* gnu/system/vm.scm (qemu-image): Remove variable 'graph'; use INPUTS as
  the #:references-graphs argument to
  'expression->derivation-in-linux-vm'.

* configure.ac (emacsuidir): New variable.
  (AC_CONFIG_FILES): Add 'emacs/guix-init.el', 'emacs/guix-helper.scm'.
* Makefile.am: Include 'emacs.am'.
* emacs.am: New file.
* doc/emacs.texi: New file.
* doc/guix.texi: Include 'emacs.texi'.
* emacs/guix-backend.el: New file.
* emacs/guix-base.el: New file.
* emacs/guix-helper.scm.in: New file.
* emacs/guix-history.el: New file.
* emacs/guix-info.el: New file.
* emacs/guix-init.el.in: New file.
* emacs/guix-list.el: New file.
* emacs/guix-main.scm: New file.
* emacs/guix-utils.el: New file.
* emacs/guix.el: New file.

* guix/scripts/lint.scm: New file. Defines a 'lint' tool for Guix packages.
* tests/lint.scm: New file.
* Makefile.am (MODULES, SCM_TESTS): Add them.
* po/guix/Makevars: Update appropriately.
* po/guix/POTFILES.in: Update appropriately.
* doc/guix.texi: Document "guix lint".

Reported by leth on #guix.

* doc/guix.texi (System Installation): Suggest running 'reboot' instead
  of 'umount /mnt'.
  (Initial RAM Disk): Add xref to SRFI-26.

* nix/nix-daemon/guix-daemon.cc (GUIX_OPT_DISABLE_STORE_OPTIMIZATION):
  Rename to...
  (GUIX_OPT_DISABLE_DEDUPLICATION): ... this.  Adjust user accordingly.
  (options): Add "disable-deduplication".  Make
  "disable-store-optimization" a hidden alias.
* doc/guix.texi (Invoking guix-daemon): Adjust to new option name.  Add
  index entry.  Improve description.

* doc/guix.texi (Bootstrapping): Adjust the text to reflect that
  '%final-inputs' is now in (gnu packages commencement).

* guix/gexp.scm (<gexp>)[natives]: New field.
  (write-gexp): Use both 'gexp-references' and
  'gexp-native-references'.
  (gexp->derivation): Use both 'gexp-inputs' and 'gexp-native-inputs',
  and append them.
  (gexp-inputs): Add 'references' parameter and honor it.
  (gexp-native-inputs): New procedure.
  (gexp->sexp)[reference->sexp]: Add 'native?' parameter and honor it.
  Use it, and use 'gexp-native-references'.
  (gexp)[collect-native-escapes]: New procedure.
  [escape->ref]: Handle 'ungexp-native' and 'ungexp-native-splicing'.
  [substitute-ungexp, substitute-ungexp-splicing]: New procedures.
  [substitute-references]: Use them, and handle 'ungexp-native' and
  'ungexp-native-splicing'.
  Adjust generated 'make-gexp' call to provide both normal references
  and native references.
  [read-ungexp]: Support 'ungexp-native' and
  'ungexp-native-splicing'.
  Add reader extension for #+.
* tests/gexp.scm (gexp-native-inputs): New procedure.
  (gexp->sexp*): Add 'target' parameter.
  ("ungexp + ungexp-native",
  "input list + ungexp-native",
  "input list splicing + ungexp-native-splicing",
  "gexp->derivation, ungexp-native",
  "gexp->derivation, ungexp + ungexp-native"): New tests.
  ("sugar"): Add tests for #+ and #+@.
* doc/guix.texi (G-Expressions): Document 'ungexp-native' et al.

* guix/gexp.scm (lower-inputs): Add #:system and #:target.  Use
  'package->cross-derivation' when TARGET is true.  Honor SYSTEM.
  (gexp->derivation): Add #:target argument.  Pass SYSTEM and TARGET to
  'lower-inputs' and 'gexp->sexp'.
  (gexp->sexp): Add #:system and #:target.  Pass them in recursive call
  and to 'package-file'.
* tests/gexp.scm (gexp->sexp*): Add 'system' and 'target' parameters.
  ("gexp->derivation, cross-compilation"): New test.

* guix/monads.scm (package-file): Add #:target keyword parameter and
  honor it.
  (package->cross-derivation): New procedure.
* tests/monads.scm ("package-file + package->cross-derivation"): New test.
* doc/guix.texi (The Store Monad): Update 'package-file' documentation.
  Add 'package->cross-derivation'.

* guix/monad-repl.scm: New file.
* guix.scm: Add it.
* Makefile.am (MODULES): Add it.
* doc/guix.texi (The Store Monad): Document it.

* doc/guix.texi (Invoking guix-daemon): Fix mention of default log location.

* doc/guix.texi: Use @pxref at the end of sentences, not @ref.

* doc/guix.texi (System Installation): Change image file name.

Suggested by Mark H. Weaver.

* gnu/system/shadow.scm (<user-group>)[system?]: New field.
  (%base-groups): Introduce 'system-group' macro, and use it.
* gnu/system.scm (user-group->gexp): Pass the 'system?' field.
* guix/build/activation.scm (add-group): Add #:system? and honor it.
  (activate-users+groups): Handle the 'system?' field.
* gnu/system/file-systems.scm (%tty-gid): Choose an ID below 1000.
* doc/guix.texi (User Accounts): Document the 'system?' field.

* Makefile.am (BUILT_SOURCES): New variable.
* daemon.am (BUILT_SOURCES): Use +=.
* doc.am (BUILT_SOURCES, MAINTAINERCLEANFILES, EXTRA_DIST): Add
  doc/os-config.texi.
  (doc/os-config.texi): New target.
* doc/guix.texi (System Installation): Include os-config.texi.

* doc/guix.texi: Add "guix system" to the dir entry.

* gnu/system/os-config.tmpl: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it
* gnu/system/install.scm (configuration-template-service): New
  procedure.
  (installation-services): Call it.
* doc/guix.texi (System Installation): Mention
  configuration-template.scm, and @include gnu/system/os-config.tmpl.

* guix/monads.scm (interned-file): New procedure.
* tests/monads.scm ("interned-file"): New test.
* doc/guix.texi (The Store Monad): Document it.

* doc/guix.texi (System Installation): Recommend partition labels.

Fixes <http://bugs.gnu.org/18061>.
Reported by Adam Pribyl <pribyl@lowlevel.cz>.

* gnu/services/dmd.scm (dmd-configuration-file)[config]: Import (guix
  build utils).
* gnu/system/install.scm (make-cow-store, cow-store-service): New
  procedures.
  (installation-services): Use it.
  (%backing-directory): New variable.
* doc/guix.texi (System Installation): Add the 'deco start cow-store
  /mnt' phase.

* gnu/system/file-systems.scm (%shared-memory-file-system): New
  variable.
  (%base-file-systems): Add it.
* doc/guix.texi (File Systems): Document it.

* guix/build/linux-initrd.scm (MS_NOSUID, MS_NODEV, MS_NOEXEC): New
  variables.
  (mount-flags->bit-mask): New procedure.
  (mount-file-system)[flags->bit-mask]: Remove.
  Use 'mount-flags->bit-mask' instead.
  In /etc/mtab, use the empty string when OPTIONS is false.
* gnu/services/base.scm (file-system-service): Add #:flags parameter and
  honor it.
* gnu/system.scm (other-file-system-services): Pass FLAGS to
  'file-system-service'.

* doc/guix.texi (Function Index): Rename to...
  (Programming Index): ... this.  Merge the type, variable, and function
  indices.

Fixes <http://bugs.gnu.org/18081>.

* gnu/system/file-systems.scm (%devtmpfs-file-system): Add
  'needed-for-boot?' field.
  (%tty-gid, %pseudo-terminal-file-system): New variables.
  (%base-file-systems): Add %PSEUDO-TERMINAL-FILE-SYSTEM.
* gnu/services/base.scm (udev-service): Remove dependency on
  'file-system-/dev'.
* gnu/system/shadow.scm (%base-groups): Add 'id' field for group 'tty'.
* guix/build/linux-initrd.scm (boot-system): Remove 'mount' call for
  /dev/pts.
* doc/guix.texi (File Systems): Add %pseudo-terminal-file-system.

* gnu/system/file-systems.scm (<file-system>)[create-mount-point?]: New
  field.
* gnu/services/base.scm (file-system-service): Add #:create-mount-point?
  parameter and honor it.
* gnu/system.scm (other-file-system-services): Update
  'file-system-service' call accordingly.
* doc/guix.texi (File Systems): Document it.

Suggested by Adam Pribyl <pribyl@lowlevel.cz>.

* gnu/services/base.scm (udev-service)[requirement]: Add
  'file-system-/dev'.
* gnu/system/file-systems.scm (%devtmpfs-file-system,
  %base-file-systems): New variables.
* gnu/system/install.scm (installation-services)[file-systems]: Use
  %base-file-systems.
* build-aux/hydra/demo-os.scm (file-systems): Likewise.
* doc/guix.texi (System Installation): Show %BASE-FILE-SYSTEMS in the
  example.
  (Using the Configuration System): Likewise.
  (File Systems): Document %base-file-systems, %devtmpfs-file-system,
  %binary-format-file-system, and %fuse-control-file-system.

* doc/guix.texi (System Installation): s/are/is/.

* doc/guix.texi: Update the documentation.
* guix/scripts/package.scm: Add a "show" option.
* tests/guix-package.sh: Add a test for the "show" option.

* doc/guix.texi (Invoking guix refresh): Show example output of the
  command.

* guix/packages.scm (package-direct-inputs): New procedure.
* gnu/packages.scm (vhash-refq, package-direct-dependents)
  (package-transitive-dependents, package-covering-dependents): New procedures.
* guix/scripts/refresh.scm (%options, show-help, guix-refresh): Add
  --list-dependent option.
* doc/guix.texi (Invoking guix refresh): Document '--list-dependent' option.

* doc/guix.texi (Using the Configuration System): 'gid' -> 'group'
  in user-account example.
  (Initial RAM Disk): 'base-init' -> 'base-initrd'.

* doc/guix.texi (Setuid Programs): New node.