gnu: w3m: Update to 0.5.3+git20170102 [security fixes].

See 'NEWS' and 'ChangeLog' in the source distribution for more
information about the security-related bug fixes.

* gnu/packages/w3m.scm (w3m): Update to 0.5.3+git20170102.

Revert "gnu: gitolite: Fix shebangs in hooks."

This change embedded store references in the shebangs of scripts that
were meant to be copied out of the store. Those scripts would break when
the interpreters expected by the shebangs were garbage collected.

<https://debbugs.gnu.org/cgi/bugreport.cgi?bug=25966#28>

This reverts commit d0c16adb190c7244ee3ef1329cba78a015ae5d10.

pack: Add unit test.

* guix/scripts/pack.scm (self-contained-tarball): Add #:tar option.
[build](tar-supports-sort?): New variable.  Use it.
* tests/pack.scm: New file.
* Makefile.am (SCM_TESTS): Add it.

pack: Use maximum compression; use '-n' for gzip.

* guix/scripts/pack.scm (<compressor>)[tar-option]: Remove.
[command]: New field.
(%compressors): Provide complete commands.  Use '-9' or equivalent for
each compressor; use '-n' for gzip.
(self-contained-tarball)[build]: Adjust accordingly.

Revert "gnu: nss: Use 'modify-phases' syntax."

This reverts commit 87f1c7efc18f8996b0b2817a5f7b84eebe2ddf5a.

Revert "gnu: nss, nss-certs: Update to 3.29.3."

Hydra failed to build this version. See discussion at
https://lists.gnu.org/archive/html/guix-devel/2017-03/msg00408.html.

This reverts commit 4f3dcdd99ba13ab3bdbf1e014afcd076cd95fac7.

gnu: Add ocaml-ppx-typerep-conv.

* gnu/packages/ocaml.scm (ocaml-ppx-typerep-conv): New variable.

gnu: Add ocaml-ppx-let.

* gnu/packages/ocaml.scm (ocaml-ppx-let): New variable.

gnu: Add ocaml-ppx-enumerate.

* gnu/packages/ocaml.scm (ocaml-ppx-enumerate): New variable.

gnu: Add ocaml-ppx-assert.

* gnu/packages/ocaml.scm (ocaml-ppx-assert): New variable.

gnu: Add ocaml-ppx-here.

* gnu/packages/ocaml.scm (ocaml-ppx-here): New variable.

gnu: Add ocaml-ppx-variants-conv.

* gnu/packages/ocaml.scm (ocaml-ppx-variants-conv): New variable.

gnu: Add ocaml-ppx-sexp-conv.

* gnu/packages/ocaml.scm (ocaml-ppx-sexp-conv): New variable.

gnu: Add ocaml-variantslib.

* gnu/packages/ocaml.scm (ocaml-variantslib): New variable.

gnu: Add ocaml-typerep.

* gnu/packages/ocaml.scm (ocaml-typerep): New variable.

gnu: Add ocaml-sexplib.

* gnu/packages/ocaml.scm (ocaml-sexplib): New variable.

gnu: asciidoc: Add XML and XSLT support.

* gnu/packages/documentation.scm (asciidoc)[arguments]: Add
set-xml-binary-paths phase.
[inputs]: Add libxml2 and libxslt.

pack: Add '--symlink'.

* guix/scripts/pack.scm (self-contained-tarball): Add #:symlinks
parameter.
[build](symlink->directives): New procedure
(directives): New variable.
Add call to 'evaluate-populate-directive'.  Pass the directories among
DIRECTIVES to 'tar'.
(%default-options): Add 'symlinks'.
(%options, show-help): Add '--symlink'.
(guix-pack): Honor it.
* gnu/build/install.scm (evaluate-populate-directive): Export.
* doc/guix.texi (Invoking guix pack): Document it.

nls: Mark (guix scripts pack) as translatable.

* po/guix/POTFILES.in: Add 'guix/scripts/pack.scm'.

pack: Add '--localstatedir' option.

* guix/scripts/pack.scm (self-contained-tarball): Add #:localstatedir?
parameter and honor it.
(%options, show-help): Add '--localstatedir'.
(guix-pack): Honor it.
* gnu/build/install.scm (populate-single-profile-directory): Add
 #:register? parameter and honor it.
* doc/guix.texi (Binary Installation): Use '--localstatedir' in
example.
(Invoking guix pack): Document it.