guix package: Inherit the transformed version number.

Previously, 'guix package -i emacs --with-source=./emacs-42.tar.gz'
would fail to use "42" as the version number in the manifest entry.

Reported by piyo on #guix.

* guix/scripts/package.scm (process-actions)[transform-entry]: Inherit
the version number from the result of TRANSFORM when it's a package.
* tests/guix-package.sh: Test it.

gnu: gd: Update to 2.2.1 [fixes CVE-2015-{8874, 8877}].

* gnu/packages/patches/gd-CVE-2016-3074.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.
* gnu/packages/gd.scm (gd): Update to 2.2.1.
[source]: Remove patch. Update source URL.

gnu: scrot: Add source mirror.

* gnu/packages/xdisorg.scm (scrot)[source]: Add fossies mirror.

gnu: serf: Update project source.

* gnu/packages/web.scm (serf)[source]: Releases are now hosted by Apache.
[home-page]: Project is now hosted by Apache.

gnu: xlockmore: Update to 5.47.

* gnu/packages/xdisorg.scm (xlockmore): Update to 5.47.

gnu: t1lib: Add source mirror.

* gnu/packages/fontutils.scm (t1lib)[souce]: Add fossies mirror.

gnu: synergy: Update to 1.7.6.

* gnu/packages/synergy.scm (synergy): Update to 1.7.6.

gnu: synergy: Use 'modify-phases'.

* gnu/packages/synergy.scm (synergy)[arguments]; Use 'modify-phases'.

gnu: synergy: Update project source.

* gnu/packages/synergy.scm (synergy)[source]: Use new location.
[home-page]: Use project's new website.

gnu: eyed3: Update to 0.7.9.

* gnu/packages/mp3.scm (eyed3): Update to 0.7.9.

gnu: mpc123: Use 'modify-phases'.

* gnu/packages/mp3.scm (mpc123)[arguments]: Use 'modify-phases'.

gnu: mpc123: Add new source location.

* gnu/packages/mp3.scm (mpc123)[source]: Add Debian mirror.
[home-page]: Project has moved to Github.

download: Default to a 10s connection establishment timeout.

* guix/build/download.scm (ftp-fetch): Add #:timeout and pass it to
'ftp-open'.
(http-fetch): Add #:timeout and pass it to 'open-connection-for-uri' and
in recursive calls.
(url-fetch): Add #:timeout and pass it to 'http-fetch' and 'ftp-fetch'.

download: Use URI objects for content-addressed mirrors.

This fixes a bug whereby 'http-fetch' would be passed a string instead
of a URI object.

* guix/build/download.scm (url-fetch): Rename 'content-addressed-urls'
to 'content-addressed-uris', and call 'string->uri'.

gnu: Add emacs-epl.

* gnu/packages/emacs.scm (emacs-epl): New variable.

Signed-off-by: Alex Kost <alezost@gmail.com>

gnu: emacs-async: Update to 1.9.

* gnu/packages/emacs.scm (emacs-async): Update to 1.9.

gnu: magit: Update to 2.7.0.

* gnu/packages/emacs.scm (magit): Update to 2.7.0.

gnu: moreutils: Use 'modify-phases'.

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

gnu: moreutils: Update to 0.58.

* gnu/packages/moreutils.scm (moreutils): Update to 0.58.

gnu: qemu: Make tests more verbose.

* gnu/packages/qemu.scm (qemu)[arguments]: Add 'make-gtester-verbose'
phase.