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.

gnu: qemu: Use 'install-file' instead of 'copy-file'.

* gnu/packages/qemu.scm (qemu)[arguments]: Use 'install-file'.

gnu: qemu: Use 'modify-phases'.

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

gnu: qemu: Disable parallel tests again.

* gnu/packages/qemu.scm (qemu)[arguments]: Re-add #:parallel-tests? #f,
which had been removed in a2ccaa0d790004c1c303a4421f7494ef73b65bd5.

cve: Include the 3 previous years of vulnerabilities.

* guix/cve.scm (fetch-vulnerabilities): Add 'format' call.
(current-vulnerabilities): Include the 3 previous years.

gnu: isc-dhcp: Specify CPE name.

* gnu/packages/admin.scm (isc-dhcp)[properties]: New field.

gnu: rush: Fix CVE-2013-6889.

* gnu/packages/patches/rush-CVE-2013-6889.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/rush.scm (rush): Use it.

nls: Adjust to texlive.scm renaming.

* po/packages/POTFILES.in: Adjust to texlive.scm rename in
commit 8f9ac90182c022c69600f17ef9c1149e029bc301.

substitute: Internationalize the "Downloading" message.

* guix/scripts/substitute.scm (process-substitution): I18n "Downloading"
message.

gnu: Add mitlm.

* gnu/packages/speech.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

gnu: Add autoconf-archive.

* gnu/packages/autotools.scm (autoconf-archive): New variable.

doc: Fix typo.

* doc/guix.texi (Derivations): Add 's' to "contain".

gnu: hurd: Add hurd-core-headers package.

* gnu/packages/hurd.scm (hurd-core-headers): New variable.