gnu: mlt: Update to 6.4.1.

* gnu/packages/video.scm (mlt): Update to 6.4.1.

gnu: jsoncpp: Update to 1.8.0.

* gnu/packages/serialization.scm (jsoncpp): Update to 1.8.0.

gnu: xf86-video-vmware: Update to 13.2.1.

* gnu/packages/xorg.scm (xf86-video-vmware): Update to 13.2.1.
[native-inputs]: Add eudev.

gnu: xcb-util-xrm: Update to 1.2.

* gnu/packages/xdisorg.scm (xcb-util-xrm): Update to 1.2.

gnu: xcape: Update to 1.2.

* gnu/packages/xdisorg.scm (xcape): Update to 1.2.

gnu: curl: Update replacement to 7.52.0 [fixes CVE-2016-{9586,9952,9953}].

* gnu/packages/curl.scm (curl)[replacement]: Update to 7.52.0.
(curl-7.51.0): Replace with ...
(curl-7.52.0): ... this.

gnu: imagemagick: Update to 6.9.7-0.

* gnu/packages/imagemagick.scm (imagemagick): Update to 6.9.7-0.

gnu: nmap: Update to 7.40.

* gnu/packages/admin.scm (nmap): Update to 7.40.

gnu: linux-libre: Avoid invalid "kconfig" input on armhf and mips64el.

This fixes a bug whereby:

  guix build linux-libre -s armhf-linux

would fail with:

  guix build: error: gnu/packages/linux.scm:231:2: package `linux-libre-4.8.15' has an invalid input: ("kconfig" #f)

This led 'tests/guix-system.sh' to fail.

* gnu/packages/linux.scm (make-linux-libre)[native-inputs]: Never add #f
as a "kconfig" input.

gnu: msmtp: Update to 1.6.6.

* gnu/packages/mail.scm (msmtp): Update to 1.6.6.

gnu: getmail: Update to 4.52.0.

* gnu/packages/mail.scm (getmail): Update to 4.52.0.

gnu: bogofilter: Use 'modify-phases'.

* gnu/packages/mail.scm (bogofilter)[arguments]: Use 'modify-phases'.

gnu: mutt: Update to 1.7.2.

* gnu/packages/mail.scm (mutt): Update to 1.7.2.

gnu: mailutils: Use 'modify-phases' syntax.

* gnu/packages/mail.scm (mailutils)[arguments]: Use 'modify-phases'.

gnu: mailutils: Update to 3.1.1.

* gnu/packages/mail.scm (mailutils): Update to 3.1.1.
[inputs]: Build with current readline.
[arguments]: Set sysconfdir as /etc.
[home-page]: Use https.

gnu: gnupg: Remove unneeded input.

* gnu/packages/gnupg.scm (gnupg)[inputs]: Remove adns.

gnu: borg: Update to 1.0.9.

* gnu/packages/backup.scm (borg): Update to 1.0.9.
[arguments]: Run the check phase in its own directory. Skip the test
'test_get_security_dir'.

gnu: nss: Add comment about test failures in NSS 3.27.2

* gnu/packages/gnuzilla.scm (nss): Add comment.

Revert "gnu: nss, nss-certs: Update to 3.27.2."

This reverts commit 7ab3ea426640e4e7ae798a8f72b3c90b383cb824.

import: github: Use 'json-fetch'.

* guix/import/github.scm (json-fetch*): Remove.
(latest-released-version): Adjust accordingly.