* gnu/packages/image.scm (jbig2dec): New variable.
* gnu/packages/patches/jbig2dec-ignore-testtest.patch: New file.
* gnu-system.am (dist_patch_DATA): Added the above patch.

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

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

* guix/build/syscalls.scm (network-interfaces): Update docstring.
  (%interface-line): New variable.
  (all-network-interfaces): New procedure.
* tests/syscalls.scm ("all-network-interfaces"): New test.
  ("network-interfaces"): Change to make sure the result is a subset
  of (all-network-interfaces).

* guix/build/syscalls.scm (SIOCGIFFLAGS, IFF_UP, IFF_BROADCAST,
  IFF_LOOPBACK, IF_NAMESIZE): New variables.
  (network-interface-flags, loopback-network-interface?): New
  procedures.
* tests/syscalls.scm ("network-interface-flags",
  "loopback-network-interface?"): New tests.

* guix/build/syscalls.scm (SIOCGIFCONF, ifconf-struct,
  ifreq-struct-size): New variables.
  (%ioctl, bytevector->string-list, network-interfaces): New
  procedures.
* tests/syscalls.scm ("network-interfaces"): New test.

Reported by DusXMT on #guix.

* gnu/services/networking.scm (static-networking-service): Add
  'requirement' field.  Change 'documentation' to be a string literal.

Previously 'guix pull' would just fail with "No such file or directory"
if ~/.config didn't already exist.

* guix/ui.scm (config-directory): Use 'mkdir-p' instead of 'mkdir'.
  Change the 'catch' handler to expect errors different from EEXIST.

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

* gnu/packages/algebra.scm (flint): New variable.

Remove leading articles and trailing periods in package synopses.

These are mostly two-space-after-end-of-sentence-period changes
resulting from commit 3a09e1d2.

* build-aux/sync-descriptions.scm (escape-quotes): New procedure.
  Use it.  Add quotes around the proposed description.

* gnu/system.scm (%base-packages): Change 'udev' to 'eudev'.
* gnu/services/base.scm (udev-service): Change #:udev to default to
  'eudev'.

* gnu/services/base.scm (udev-service): Adjust 'start' method to support
  eudev in addition to udev.

* gnu/system.scm (%base-packages): Add DIFFUTILS.

* gnu/services/base.scm (%base-services): Pass FUSE and ALSA-UTILS to
  'udev-service'.

* gnu/packages/patches/eudev-rules-directory.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/linux.scm (eudev): Use it.

* gnu/packages/linux.scm (eudev)[arguments]: New field.

* gnu/packages/linux.scm (fuse): Change UDEV_RULES_PATH suffix to
  /lib/udev/rules.d.

This reverts commit c9a8ad84.

* gnu/packages/linux.scm (eudev): New variable.

* gnu/packages/linux.scm (util-linux)[source]: Add 'snippet'.

* gnu/build/activation.scm (activate-current-system): Honor
  $GUIX_NEW_SYSTEM by default.
* guix/scripts/system.scm (switch-to-system): Set $GUIX_NEW_SYSTEM
  before loading SCRIPT.

* gnu/packages/linux.scm (e2fsprogs)[arguments]: Pass --disable-blkid.

* gnu/system.scm (%base-packages): Add gawk, tar, gzip, bzip2, xz, lzip,
  and wireless-tools.

* gnu/system.scm (etc-directory): Produce nsswitch.conf.

* gnu/system.scm (default-/etc/hosts): Fix the alias/address order.
  Add ::1.

* gnu/system/file-systems.scm (<mapped-device>): New record type.
* gnu/system.scm (<operating-system>)[mapped-devices]: New field.
  (luks-device-mapping): New procedure.
  (other-file-system-services)[device-mappings, requirements]: New
  procedures.  Pass #:requirements to 'file-system-service'.
  (device-mapping-services): New procedure.
  (essential-services): Use it.  Append its result to the return value.
  (operating-system-initrd-file): Add comment.
* gnu/services/base.scm (file-system-service): Add #:requirements
  parameter and honor it.
  (device-mapping-service): New procedure.
* gnu/system/linux-initrd.scm (base-initrd): Add comment.

* gnu/build/activation.scm (activate-etc): Move 'rm-f' to a local
  'define'.  When TARGET is "sudoers", make it 440.

* gnu/system.scm (etc-directory)[bashrc]: Add '\w' to PS1.

* gnu/build/install.scm (directives): Remove "/bin/sh".
* gnu/build/activation.scm (activate-/bin/sh): New procedure.
* gnu/system.scm (operating-system-activation-script): Use it.

* gnu/services/base.scm (udev-rules-union): New procedure.
  (udev-service): Add #:rules parameter.  Call 'udev-rules-union' and
  create udev.conf.  Set $UDEV_CONFIG_FILE before spawning udevd.

* gnu/system.scm (<operating-system>)[hosts-file]: New field.
  (default-/etc/hosts): New procedure.
  (etc-directory): Add #:hosts-file parameter and honor it.
  (operating-system-etc-directory): Build /etc/hosts, and pass
  it as #:hosts-file to 'etc-directory'.

* gnu/system/linux.scm (base-pam-services): Add "xlock" and
  "xscreensaver".

Before that, 'sudo' would exit with:

  sudo: /etc/sudoers is not a regular file
  sudo: no valid sudoers sources found, quitting

* gnu/build/activation.scm (activate-etc): Check if SOURCE matches
  'file-is-directory?'.  If not, use 'copy-file' instead of 'symlink'.

* gnu/build/activation.scm (activate-etc): Remove outdated comment.

* gnu/build/activation.scm (link-or-copy): New procedure.
  (activate-setuid-programs): Use it.

* gnu/packages/weechat.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.

Signed-off-by: Eric Bavier <bavier@member.fsf.org>

* gnu/packages/maths.scm (glpk): Update to 4.55.