gnu: Add go@1.10.

Building Go 1.10 with the Go 1.4 bootstrap, Thread Sanitizer from GCC 5
finds a data race during the the test suite of Go 1.10. With GCC 6, the
race doesn't seem to be present.

.##### ../misc/cgo/testsanitizers
--- FAIL: TestShared (0.03s)
    --- FAIL: TestShared/tsan_shared (2.54s)
        cshared_test.go:71: `/tmp/guix-build-go-1.10.drv-0/TestShared367937240/tsan_shared` exited with exit status 66
                ==================
                WARNING: ThreadSanitizer: data race (pid=28778)
                  Write of size 8 at 0x7ffff5495c30 by thread T1:
                    #0 pthread_attr_getstacksize <null> (tsan_shared+0x00000041be82)
                    #1 x_cgo_init <null> (libtsan_shared.so+0x00000008aeaf)
                    #2 runtime.rt0_go /tmp/guix-build-go-1.10.drv-0/go/src/runtime/asm_amd64.s:199 (libtsan_shared.so+0x000000081586)

                  Previous write of size 8 at 0x7ffff5495c30 by main thread:
                    #0 <null> <null> (0x000000000001)

                  Location is stack of thread T1.

                  Thread T1 (tid=28786, running) created by main thread at:
                    #0 pthread_create <null> (tsan_shared+0x00000040c794)
                    #1 _cgo_try_pthread_create <null> (libtsan_shared.so+0x00000008ad70)
                    #2 x_cgo_sys_thread_create <null> (libtsan_shared.so+0x00000008ab12)
                    #3 _rt0_amd64_lib /tmp/guix-build-go-1.10.drv-0/go/src/runtime/asm_amd64.s:56 (libtsan_shared.so+0x0000000813b6)

                SUMMARY: ThreadSanitizer: data race ??:0 __interceptor_pthread_attr_getstacksize

* gnu/packages/golang.scm (go-1.10): New variable.
(go-1.4)[native-inputs]: Use gcc:lib version 6.

gnu: Add RawTherapee.

* gnu/packages/photo.scm (rawtherapee): New variable.

gnu: Add libiptcdata.

* gnu/packages/image.scm (libiptcdata): New variable.

gnu: Add emacs-nov.

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

gnu: Add emacs-esxml.

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

gnu: assword: Update to 0.11.

* gnu/packages/password-utils.scm (assword): Update to 0.11.

gnu: python-cffi: Update phase style.

* gnu/packages/libffi.scm (python-cffi)[arguments]: Substitute INVOKE
for SYSTEM*, end phases with #t, and remove unneeded bits from the
‘install-doc’ phase.

gnu: python-cffi: Update to 1.11.4.

* gnu/packages/libffi.scm (python-cffi): Update to 1.11.4.

gnu: perl-scalar-list-utils: Update to 1.50.

* gnu/packages/perl.scm (perl-scalar-list-utils): Update to 1.50.

gnu: Add nghttp2.

* gnu/packages/web.scm (nghttp2): New public variable.

gnu: ruby-ffi: Update to 1.9.22.

* gnu/packages/libffi.scm (ruby-ffi): Update to 1.9.22.

gnu: libpsl: Update to 0.20.0.

* gnu/packages/web.scm (libpsl): Update to 0.20.0.

gnu: Use HTTPS for supported freedesktop.org home pages.

* gnu/packages/fontutils.scm (fontconfig)[home-page]: Use HTTPS.
* gnu/packages/freedesktop.scm (python-pyxdg, accountsservice)
(modem-manager, telepathy-mission-control, telepathy-mission-control)
(colord-gtk, desktop-file-utils)[home-page]: Likewise.
* gnu/packages/ghostscript.scm (libspectre)[home-page]: Likewise.
* gnu/packages/glib.scm (dbus, dbus-glib, telepathy-glib)[home-page]:
Likewise.
* gnu/packages/gnome.scm (shared-mime-info, hicolor-icon-theme)
(libxklavier, colord, upower)[home-page]: Likewise.
* gnu/packages/gstreamer.scm (orc, python-gst)[home-page]: Likewise.
* gnu/packages/libcanberra.scm (sound-theme-freedesktop)[home-page]:
Likewise.
* gnu/packages/libreoffice.scm (libexttextcat)[home-page]: Likewise.
* gnu/packages/polkit.scm (polkit-gnome, polkit-gnome)[home-page]:
Likewise.
* gnu/packages/pulseaudio.scm (pavucontrol)[home-page]: Likewise.
* gnu/packages/python.scm (python-dbus)[home-page]: Likewise.
* gnu/packages/xdisorg.scm (startup-notification)[home-page]: Likewise.

gnu: polkit: Update phase & snippet style.

* gnu/packages/polkit.scm (polkit)[source]: End snippet with #t.
[arguments]: Substitute INVOKE for SYSTEM* and end phases with #t.

gnu: perl-xml-libxslt: Update to 1.96.

* gnu/packages/xml.scm (perl-xml-libxslt): Update to 1.96.

gnu: perl-net-smtp-ssl: Update to 1.04.

* gnu/packages/web.scm (perl-net-smtp-ssl): Update to 1.04.

gnu: perl-http-server-simple: Update to 0.52.

* gnu/packages/web.scm (perl-http-server-simple): Update to 0.52.

gnu: dvdstyler: Remove hard-coded version string.

* gnu/packages/cdrom.scm (dvdstyler)[arguments]: Remove a hard-coded
version string from the docbook-xsl search path.

gnu: libdvbpsi: Update to 1.3.2.

* gnu/packages/video.scm (libdvbpsi): Update to 1.3.2.

gnu: tinc: Update to 1.0.33.

* gnu/packages/vpn.scm (tinc): Update to 1.0.33.