gnu: Add guile-sly.

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

gnu: calf: Update tarball URL.

* gnu/packages/audio.scm (calf)[source]: Use tarball from new project
  website instead of sourceforge.

gnu: eigen: Update to 3.2.7.

* gnu/packages/algebra.scm (eigen): Upgrade to 3.2.7.
  [source]: Add 'file-name' field.

gnu: mit-krb5: Add fixes for CVE-2015-{2695,2696,2697,2698}.

* gnu/packages/patches/mit-krb5-CVE-2015-2695-pt1.patch,
  gnu/packages/patches/mit-krb5-CVE-2015-2695-pt2.patch,
  gnu/packages/patches/mit-krb5-CVE-2015-2696.patch,
  gnu/packages/patches/mit-krb5-CVE-2015-2697.patch,
  gnu/packages/patches/mit-krb5-CVE-2015-2698-pt1.patch,
  gnu/packages/patches/mit-krb5-CVE-2015-2698-pt2.patch: New files.
* gnu-system.am (dist_patch_DATA): Add them.
* gnu/packages/mit-krb5.scm (mit-krb5)[native-inputs]: Add patches.

gnu: mit-krb5: Refactor build code; support multiple patches.

* gnu/packages/mit-krb5.scm (mit-krb5)[source]: Use version-major+minor.
  [arguments]: Use modify-phases.  Split and rewrite 'unpack' phase into
  'unpack', 'apply-patches', and 'enter-source-directory' phases.  Add a
  'pre-check' phase instead of replacing the 'check' phase.  Combine
  substitutions on the same file.  In the 'unpack' phase, find
  native-inputs with names starting with "patch/" and apply them all.
  Print a message for each patch applied.  Do not rely on the result of
  'chdir', which is unspecified.  Determine the names of the inner tar
  file and the directory in a more robust way.  Add (ice-9 ftw),
  (ice-9 match) and (srfi srfi-1) to #:modules.

gnu: mit-krb5: Update to 1.13.2.

* gnu/packages/mit-krb5.scm (mit-krb5): Update to 1.13.2.
  [native-inputs]: Remove "patch/init-fix".
* gnu/packages/patches/mit-krb5-init-fix.patch: Delete file.
* gnu-system.am (dist_patch_DATA): Remove it.

gnu: Adjust formatting as recommended by 'guix lint'.

* gnu/packages/aidc.scm (barcode, qrencode),
  gnu/packages/bash.scm (bash, bash-completion),
  gnu/packages/busybox.scm (busybox),
  gnu/packages/cdrom.scm (cdparanoia),
  gnu/packages/cmake.scm (cmake),
  gnu/packages/conkeror.scm (conkeror),
  gnu/packages/cook.scm (cook),
  gnu/packages/curl.scm (curl),
  gnu/packages/docbook.scm (docbook-xsl),
  gnu/packages/enlightenment.scm (enlightenment),
  gnu/packages/games.scm (abbaye),
  gnu/packages/geeqie.scm (exiv2),
  gnu/packages/gimp.scm (gegl),
  gnu/packages/gl.scm (glu, freeglut, ftgl),
  gnu/packages/glib.scm (glib),
  gnu/packages/gnome.scm (orbit2, gconf, geocode-glib),
  gnu/packages/gstreamer.scm (gstreamer, gst-plugins-base),
  gnu/packages/linux.scm (util-linux),
  gnu/packages/lisp.scm (gcl, ecl),
  gnu/packages/maths.scm (gnuplot, hdf5),
  gnu/packages/ssh.scm (dropbear),
  gnu/packages/web.scm (json-c): Remove tabulations and trailing
  white spaces or reformat to fit within 80 columns.
* gnu/packages/audio.scm (aubio),
  gnu/packages/emacs.scm (emacs-s),
  gnu/packages/engineering.scm (geda-gaf),
  gnu/packages/games.scm (dosbox),
  gnu/packages/gnome.scm (gusb),
  gnu/packages/gtk.scm (gtk+),
  gnu/packages/guile.scm (guile-wisp),
  gnu/packages/hurd.scm (hurd-headers),
  gnu/packages/wm.scm (i3-wm): Adjust synopsis or description.

gnu: upower: Update to 0.99.3.

* gnu/packages/gnome.scm (upower): Update to 0.99.3.

gnu: upower: Enable GObject introspection.

* gnu/packages/gnome.scm (upower)[native-inputs]: Add gobject-introspection.

gnu: gcr: Update to 3.18.0, enable introspection.

* gnu/packages/gnome.scm (gcr): Update to 3.18.0.
  [native-inputs]: Add gobject-introspection and libxslt.

gnu: nix: Don't propagate Perl libraries.

* gnu/packages/package-management.scm (nix): Move perl-www-curl,
  perl-dbi and perl-dbd-sqlite from 'propagated-inputs' to 'inputs'.
  [arguments]: Add #:configure-flags.

gnu: nix: Update to 1.10.

* gnu/packages/package-management.scm (nix): Update to 1.10.

lint: Have connections time out after 3 seconds.

* guix/scripts/lint.scm (probe-uri): Add #:timeout parameter.  Pass it
  to 'open-connection-for-uri' and 'ftp-open'.
  (validate-uri): Pass #:timeout 3 to 'probe-uri'.

download: Always use AI_ADDRCONFIG when resolving host names.

* guix/build/download.scm (open-socket-for-uri): Always pass
  AI_ADDRCONFIG to 'getaddrinfo' as recommended in the fine Guile
  manual.
* guix/ftp-client.scm (ftp-open): Ditto.

download: Add timeout parameter for connections.

* guix/build/download.scm (ensure-uri): New procedure.
(current-http-proxy): New variable.
(open-socket-for-uri): Copy from Guile commit aaea5b2, but add #:timeout
parameter and use 'connect*' instead of 'connect'.
(open-connection-for-uri): Add #:timeout parameter and pass it to
'open-socket-for-uri'.

ftp-client: Add timeout parameter to 'ftp-open'.

* guix/ftp-client.scm (catch-EINPROGRESS): New macro.
(connect*): New procedure.
(ftp-open): Add #:timeout parameter.  Use 'connect*' instead of
'connect' and pass it TIMEOUT.

ftp-client: Restrict to TCP connections.

* guix/ftp-client.scm (ftp-open): Force SOCK_STREAM as the socket type
  to avoid calling 'connect' on a datagram socket.

emacs: Adjust 'guix environment' popup.

* emacs/guix-command.el (guix-command-improve-environment-argument): Use
  "E" for '--expose' and "S" for '--share' to distinguish them from
  '--expression' and '--system' accordingly.  Make '--ad-hoc' an option
  taking packages instead of a simple switch.
  (guix-command-rest-argument): Complete shell command instead of
  packages for '--' argument.
  (guix-command-additional-arguments): Add fake 'packages' argument.
  New variable.
  (guix-command-additional-arguments): Use it.
  (guix-command-post-process-environment-packages,
  guix-command-post-process-environment-ad-hoc): New functions.
  (guix-command-post-processors): Add "environment" command with the new
  argument processors.

emacs: Adjust 'guix container' popup.

* emacs/guix-command.el (guix-command-improve-action-argument): Use "C"
  key for 'container' action to distinguish it from 'challenge'.
  (guix-command-rest-argument): Add positional arguments.

emacs: Improve post processing of popup arguments.

* emacs/guix-command.el (guix-command-switches,
  guix-command-rest-arg-regexp): New variables.
  (guix-command-post-processors,
  guix-command-post-process-matching-args,
  guix-command-post-process-rest-single,
  guix-command-post-process-rest-multiple,
  guix-command-post-process-rest-multiple-leave,
  guix-command-post-process-package-args): New functions.
  (guix-command-post-process-rest-multiple): Take 2 arguments.
  (guix-command-define-popup-action): Adjust accordingly.
* emacs/guix-utils.el (guix-modify): New function.