gnu: llvm: Add "license:" prefix.

* gnu/packages/llvm.scm: Import (guix licenses) with "license:" prefix.

gnu: llvm: Update to 3.5.2.

* gnu/packages/llvm.scm (llvm-3.5): Update to 3.5.2.

publish: Add '--compression'.

* guix/scripts/publish.scm (show-help, %options): Add '--compression'.
(<compression>): New record type.
(%no-compression, %default-gzip-compression): New variables.
(%default-options): Add 'compression' key.
(narinfo-string): Add #:compression parameter and honor it.
(render-narinfo): Likewise.
(render-nar): Likewise.
<top level>: Add call to 'declare-header!'.
(swallow-zlib-error): New macro.
(nar-response-port): New procedure.
(http-write): Add call to 'force-output'.  Use 'nar-response-port'
instead of 'response-port'.  Use 'swallow-zlib-error'.
(make-request-handler): Add #:compression parameter and honor it.  Add
"nar/gzip" URL handler.
(run-publish-server): Add #:compression parameter and honor it.
(guix-publish): Honor --compression.
* tests/publish.scm (http-get-port, wait-until-ready): New procedures.
<top level>: Run main server with "-C0".  Call 'wait-until-ready'.
("/nar/gzip/*", "/*.narinfo with compression"): New tests.
* doc/guix.texi (Invoking guix publish): Document it.

Add (guix zlib).

* guix/zlib.scm, tests/zlib.scm: New files.
* Makefile.am (MODULES): Add guix/zlib.scm.
(SCM_TESTS): Add tests/zlib.scm.
* m4/guix.m4 (GUIX_LIBGCRYPT_LIBDIR): New macro.
* configure.ac (LIBGCRYPT_LIBDIR): Use it.  Define and substitute
'LIBZ'.
* guix/config.scm.in (%libz): New variable.

services: shepherd: Clarify error message about missing service.

Suggested by Tobias Geerinckx-Rice <me@tobias.gr>.

* gnu/services/shepherd.scm (assert-valid-graph)[assert-satisfied-requirements]:
Clarify error message.

gnu: giac-xcas: Update to 1.2.2-75.

* gnu/packages/algebra.scm (giac-xcas): Update to 1.2.2-75.

Revert "gnu: gnutls: Fix test failure."

This reverts commit 1d14bf9f5ff43ff9097f1c5e1e2d37528eb74971.

gnu: gd: Fix failing test on i686.

* gnu/packages/patches/gd-fix-test-on-i686.patch: New file.
* gnu/local.mk (dist_PATCH_DATA): Add it.
* gnu/packages/gd.scm (gd)[source]: Add the patch.

gnu: gnutls: Fix test failure.

* gnu/packages/patches/gnutls-fix-stale-test.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/tls.scm (gnutls)[replacement]: New field.
(gnutls/fixed): New variable.

gnu: libinput: Update to 1.4.0.

* gnu/packages/freedesktop.scm (libinput): Update to 1.4.0.

gnu: efl: Use 'modify-phases'.

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

gnu: efl: Remove valgrind from inputs.

* gnu/packages/enlightenment.scm (efl)[inputs]: Remove valgrind.

gnu: python-gst: Update to 1.8.2.

* gnu/packages/gstreamer.scm (python-gst): Update to 1.8.2.

gnu: gst-libav: Update to 1.8.2.

* gnu/packages/gstreamer.scm (gst-libav): Update to 1.8.2.

gnu: gst-plugins-ugly: Update to 1.8.2.

* gnu/packages/gstreamer.scm (gst-plugins-ugly): Update to 1.8.2.

gnu: gst-plugins-good: Update to 1.8.2.

* gnu/packages/gstreamer.scm (gst-plugins-good): Update to 1.8.2.

gnu: gst-plugins-base: Update to 1.8.2.

* gnu/pakcages/gstreamer.scm (gst-plugins-base): Update to 1.8.2.

gnu: gstreamer: Update to 1.8.2.

* gnu/packages/gstreamer.scm (gstreamer): Update to 1.8.2.

Thank Thomas.

Set "GUIX_LOCPATH" in 'guix-daemon.service'.

Suggested by Thomas Danckaert <thomas.danckaert@gmail.com>.

* etc/guix-daemon.service.in (Environment): New value.