gnu: cmake: Install man pages and docs in share/{man,doc}.

* gnu/packages/cmake.scm (cmake): Pass --mandir and --docdir to configure.
  Rewrite the code that selects the first two components of the version.

gnu: flac: Install man pages in share/man.

* gnu/packages/xiph.scm (flac): Add --mandir configure flag.

gnu: libvorbis: disable parallel tests

* gnu/packages/xiph.scm (libvorbis): disable parallel tests

gnu: openssh: Upgrade to 6.6p1.

* gnu/packages/ssh.scm (openssh): Upgrade to 6.6p1.

daemon: Really override the substituters setting.

Reported by Andreas Enge <andreas@enge.fr>:
<https://lists.gnu.org/archive/html/guix-devel/2014-03/msg00211.html>.

* nix/nix-daemon/guix-daemon.cc (main): Set the 'NIX_SUBSTITUTERS'
  env. var.  Leave 'settings.substituters' unchanged.

pk-crypto: Don't use Ed25519 when libgcrypt is older than 1.6.0.

* guix/pk-crypto.scm (gcrypt-version): New procedure.
* guix/scripts/archive.scm (%key-generation-parameters): New variable.
  (%options) <generate-key>: Use it.
* tests/pk-crypto.scm ("sign + verify, Ed25519"): Skip if using gcrypt < 1.6.0.

gnu: tzdata: Upgrade to 2014a.

gnu: lynx: Upgrade to 2.8.8rel.2.

* gnu/packages/lynx.scm (lynx): Upgrade to 2.8.8rel.2.

gnu: bc: Install docs in share/man and share/info.

* gnu/packages/algebra.scm (bc): Pass --mandir and --infodir to configure.

gnu: unzip: Install man pages in share/man.

* gnu/packages/zip.scm (unzip): Substitute /share/man/ for /man/ in Makefile.

gnu: screen: Install docs in share/man and share/info.

* gnu/packages/screen.scm (screen): Add --mandir and --infodir
  configure flags.

gnu: netcat: Install docs in share/man and share/info.

* gnu/packages/admin.scm (netcat): Add --mandir and --infodir
  configure flags.

offload: Send build logs to file descriptor 4.

* guix/scripts/offload.scm (with-error-to-port): New macro.
  (remote-pipe): Add #:error-port parameter.  Use 'with-error-to-port'
  around 'open-pipe*' call.
  (build-log-port): New procedure.
  (offload): Change #:log-port to default to (build-log-port).  Call
  'remote-pipe' with #:error-port LOG-PORT.

substitute-binary: Quietly handle 404s when fetching narinfos.

* guix/scripts/substitute-binary.scm (fetch): Add #:quiet-404?
  parameter.  Upon &http-get-error, re-raise C if the QUIET-404? is
  true and the code is 404.
  (fetch-narinfo): Pass #:quiet-404? #t.

gnu: xterm: Upgrade to 303.

* gnu/packages/xorg.scm (xterm): Upgrade to 303.

pk-crypto: Use RFC6979 when signing with an ECC or DSA key.

* guix/pk-crypto.scm (bytevector->hash-data): Add #:key-type parameter.
  Use the 'pkcs1' flag when KEY-TYPE is 'rsa', and 'rfc6979' when
  KEY-TYPE is 'ecc' or 'dsa'.
  (key-type): New procedure.
* guix/scripts/authenticate.scm (read-hash-data): Add 'key-type'
  parameter.  Pass it to 'bytevector->hash-data'.  Adjust caller
  accordingly.
* tests/pk-crypto.scm (%ecc-key-pair): New variable.
  ("key-type"): New test.
  ("sign + verify"): Pass #:key-type to 'bytevector->hash-data'.
  ("sign + verify, Ed25519"): New test.

gnu: imagemagick: Upgrade to 6.8.8-8.

* gnu/packages/imagemagick.scm (imagemagick): Upgrade to 6.8.8-8.

gnu: Add Window Maker.

* gnu/packages/gnustep.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.

tests: Test recovery from 'valid-path?' RPCs with an invalid parameter.

* tests/store.scm ("valid-path? live", "valid-path? false", "valid-path?
  error", "valid-path? recovery"): New tests.

Update 'nix-upstream' sub-module.

* nix-upstream: Update.