daemon: Properly initialize libgcrypt.
* nix/nix-daemon/guix-daemon.cc (main): Call `gcry_check_version'.
build: Avoid error message during `make clean' when `test-tmp' doesn't exist.
* daemon.am (clean-local): Check whether $(GUIX_TEST_ROOT) exists before
running `find'.
distro: Add Libntlm, GNU GSS and GNU SASL.
* distro/packages/gsasl.scm: New file.
* Makefile.am (MODULES): Add it.
distro: automake: Update to 1.12.6.
* distro/packages/autotools.scm (automake): Update to 1.12.6.
distro: Add GNU Libidn.
* distro/packages/libidn.scm: New file.
* Makefile.am (MODULES): Add it.
distro: Update libtasn1 and gnutls.
* distro/packages/gnutls.scm: Update libtasn1 and gnutls.
distro: Add GNU idutils.
* distro/packages/idutils.scm: New file.
* Makefile.am (MODULES): Add it.
distro: Add rsync.
* distro/packages/rsync.scm: New file.
* Makefile.am (MODULES): Add it.
distro: Add mpfrcx and fplll.
* distro/packages/algebra.scm: New file.
* Makefile.am (MODULES): Add it.
distro: Add Usbutils.
* distro/packages/linux.scm (usbutils): New variable.
distro: Add Libusb.
* distro/packages/libusb.scm: New file.
* Makefile.am (MODULES): Add it.
distro: Add Check.
* distro/packages/check.scm: New file.
* Makefile.am (MODULES): Add it.
download: Remove unreachable SourceForge mirror.
* guix/download.scm (%mirrors)[sourceforge]: Remove kent.dl.*, which is
unreachable.
daemon: Gracefully handle Nix errors.
* nix/nix-daemon/guix-daemon.cc (main): Run Nix code in an exception
handler; gracefully print error messages, and exit with EXIT_FAILURE.
daemon: Warn against running as root without `--build-users-group'.
* nix/nix-daemon/guix-daemon.cc (main): Recommend using
`--build-users-group' when running as root without a build users
group.
daemon: Add `--chroot-directory'.
* nix/nix-daemon/guix-daemon.cc (GUIX_OPT_CHROOT_DIR): New macro.
(options): Add `--chroot-directory'.
(parse_opt): Handle it.
guix-build: Add `--verbosity'.
* guix-build.in (%default-options): Add `verbosity'.
(%options): Add `--verbosity'.
(guix-build): Pass it to `set-build-options'.
(show-help): Update accordingly.
* doc/guix.texi (Invoking guix-build): Document `--verbosity'.
daemon: Add `--debug' option.
* nix/nix-daemon/guix-daemon.cc (GUIX_OPT_DEBUG): New macro.
(options): Add `--debug'.
(parse_opt): Set `verbosity' upon GUIX_OPT_DEBUG.
daemon: Disable use of substitutes for now.
* nix/nix-daemon/guix-daemon.cc (main): Set `settings.useSubstitutes' to
false, and `settings.substituters' to the empty list.