* guix/derivations.scm (substitution-oracle): Add #:mode parameter and
honor it.
(derivation-prerequisites-to-build): Likewise.
[derivation-built?]: Take it into account.
* guix/ui.scm (show-what-to-build): Add #:mode parameter.  Pass it to
'substitute-oracle' and 'derivations-prerequisites-to-build'.
* tests/derivations.scm ("derivation-prerequisites-to-build in 'check'
mode"): New test.

* gnu/packages/mail.scm (gmime): Update to 2.6.20.
[arguments]: Use modify-phases syntax.

* gnu/packages/guile.scm (guile-sly)[source]: Use 'https'.  Failing to
do that, we get redirected to 'https', which fails because GnuTLS is
missing.

* guix/scripts/build.scm (show-build-options-help)
(%standard-build-options): Add --rounds.
(set-build-options-from-command-line): Honor it.
* doc/guix.texi (Invoking guix build): Document it.
* doc/contributing.texi (Submitting Patches): Mention it.

* guix/store.scm (set-build-options): Add #:rounds parameter and honor it.
* tests/store.scm ("build multiple times"): New test.

This makes it easy to detect non-deterministic builds.

* nix/libstore/build.cc (DerivationGoal): Remove 'InodesSeen'; add
'curRound', 'nrRound', and 'prevInfos'.
(DerivationGoal::inputsRealised): Initialize 'nrRound'.
(NotDeterministic): New error type.
(DerivationGoal::buildDone): Check whether we need to repeat.
(DerivationGoal::startBuilder): Adjust message.
(DerivationGoal::registerOutputs): Check whether we get the same result.
* nix/libstore/globals.cc (Settings::get(const string & name, int def)):
New method.
* nix/libstore/globals.hh (Settings): Add it.
* nix/libstore/store-api.hh (ValidPathInfo): Add operator ==.
* nix/nix-daemon/nix-daemon.cc (performOp): Allow "build-repeat" for
"untrusted" users.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>

* gnu/packages/python.scm (python-pillow, python2-pillow): Update to 3.0.0.

* gnu/packages/linux.scm (numactl)[source]: Update to 2.0.10.
  [arguments]: Adapt phases to use the autotools machinery.
  [native-inputs]: Add autotools packages.

Suggested by Efraim Flashner <efraim@flashner.co.il>.

* guix/gnu-maintenance.scm (latest-ftp-release): Add #:keep-file?
parameter and honor it.
(latest-gnome-release)[%not-dot]: New variable.
[even-minor-version?, even-numbered-tarball?]: New procedures.
Pass EVEN-NUMBERED-TARBALL? as #:keep-file? argument.

* gnu/packages/gnome.scm (glade3): Update to 3.8.5.

* gnu/packages/autogen.scm (autogen): Update to 5.18.7.

* guix/gnu-maintenance.scm (latest-ftp-release): Add #:file->signature
parameter.  Honor it.
(latest-gnome-release): Pass #:file->signature.
* guix/upstream.scm (coalesce-sources): Keep 'signature-urls' as #f
unless both sources provide it.

* guix/gnu-maintenance.scm (ftp-server/directory)[quirks]: Remove glib.
(false-if-ftp-error): New macro.
(latest-release*): Use it.
(non-emacs-gnu-package?): Rename to...
(pure-gnu-package?): ... this.  Add call to 'gnome-package?'.
(%gnu-updater): Adjust accordingly.
(gnome-package?, latest-gnome-release): New procedures.
(%gnome-updater): New variable.
* guix/scripts/refresh.scm (%updaters): Add %GNOME-UPDATER.
* doc/guix.texi (Invoking guix refresh): Mention it.

* guix/gnu-maintenance.scm (latest-release): Rename to...
(latest-ftp-release): ... this.  Add #:server and #:directory
parameters.
(latest-release): New procedure.

* guix/scripts/refresh.scm (lookup-updater): Call 'leave' when 'find'
returns #f.

* guix/gnu-maintenance.scm (latest-release): Filter out "w32"
directories.

* tests/gnu-maintenance.scm: New file.
* Makefile.am (SCM_TESTS): Add it.
* guix/gnu-maintenance.scm (release-file?): Export.

* guix/gnu-maintenance.scm (ftp-server/directory): Add comment.
(release-file?): Use 'string-ci=?' instead of 'equal?' when comparing
project names.

* guix/gnu-maintenance.scm (%tarball-rx): Tweak to match IceCat tarball
patterns.

With this, (latest-release "gcc") returns an <upstream-source> with URL:

  ftp://ftp.gnu.org/gnu/gcc/gcc-5.3.0/gcc-5.3.0.tar.gz

Previous it would omit "gcc-5.3.0/" from the URL.

Fixes a regression introduced in 0a7c5a09.

* guix/gnu-maintenance.scm (latest-release)[file->url, file->source]:
Add 'directory' parameter.  Update users.

* doc/guix.texi (Invoking guix environment): Remove outdated mention of
'/env' for '--container'.

The Node build system was previously building its own copies of
OpenSSL (yikes!), libuv, and zlib.

* gnu/packages/node.scm (node)[inputs]: Add openssl, libuv, and zlib.
  [arguments]: Add configure flags for using system libraries.  Use
  'modify-phases' syntax.

* gnu/packages/linux.scm (util-linux)[description]: Give some more
  information about the package.

Signed-off-by: Andreas Enge <andreas@enge.fr>

* gnu/packages/pcre.scm (pcre): Update to 8.38.  Add source URI for
  main FTP site.

* gnu/packages/patches/libxml2-CVE-2015-1819.patch,
  gnu/packages/patches/libxml2-CVE-2015-7941-pt1.patch,
  gnu/packages/patches/libxml2-CVE-2015-7941-pt2.patch,
  gnu/packages/patches/libxml2-CVE-2015-7942-pt1.patch,
  gnu/packages/patches/libxml2-CVE-2015-7942-pt2.patch,
  gnu/packages/patches/libxml2-CVE-2015-8035.patch,
  gnu/packages/patches/libxml2-bug-737840.patch,
  gnu/packages/patches/libxml2-bug-738805.patch,
  gnu/packages/patches/libxml2-bug-746048.patch,
  gnu/packages/patches/libxml2-bug-747437.patch,
  gnu/packages/patches/libxml2-bug-751603.patch,
  gnu/packages/patches/libxml2-bug-751631.patch,
  gnu/packages/patches/libxml2-bug-754946.patch,
  gnu/packages/patches/libxml2-bug-754947.patch,
  gnu/packages/patches/libxml2-bug-755857.patch,
  gnu/packages/patches/libxml2-fix-catalog-corruption.patch,
  gnu/packages/patches/libxml2-id-attrs-in-xmlSetTreeDoc.patch,
  gnu/packages/patches/libxml2-node-sort-order-pt1.patch,
  gnu/packages/patches/libxml2-node-sort-order-pt2.patch: Delete files.
* gnu-system.am (dist_patch_DATA): Remove them.
* gnu/packages/xml.scm (libxml2): Update to 2.9.3.  Remove patches.

* gnu/packages/tls.scm (openssl): Update to 1.0.2e.
  [arguments]: Rename 'fix-man-dir' phase to 'patch-Makefile.org',
  and patch SHELL in Makefile.org.  Add 'fix-broken-symlinks' phase.
  Return #t from 'patch-tests' phase.

* gnu/packages/password-utils.scm (keepassx): Update to 2.0.
[source]: Change to official release location.

* gnu/packages/python.scm (python2-zope-security): Do it.

* gnu/packages/man.scm (help2man): Update to 1.47.3.

* gnu/packages/gnunet.scm (libmicrohttpd): Update to 0.9.47.

* gnu/packages/mp3.scm (mp3info): Update source URL.

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

* gnu/packages/version-control.scm (myrepos): New variable.

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

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

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

* gnu/packages/messaging.scm (gajim): Update to 0.16.4.

* gnu/packages/gnupg.scm (pinentry): Update to 0.9.6.
[inputs]: Add libsecret.

* gnu/packages/gnupg.scm (gpgme): Update to 1.6.0.

* gnu/packages/gnupg.scm (gnupg): Update to 2.1.10.
[inputs]: Add adns.

* gnu/packages/gnupg.scm (gnupg-2.0): Update to 2.0.29.
[inputs]: Add adns.

* gnu/packages/gnupg.scm (libassuan): Update to 2.4.2.