nls: Add package files for translation.

* po/packages/POTFILES.in: Add a bunch of files.

build: Ensure man pages are not rebuilt by users.

* doc.am (doc/guix.1): Remove dependency on 'scripts/guix' since every user
  would end up rebuilding 'guix.1'.  Add dependency on guix/scripts/*.scm.
  (doc/guix-daemon.1): For the same reason, depend on 'guix-daemon.cc' instead
  of 'guix-daemon'.
  (doc/guix-$(1).1): Similarly, remove dependency on 'scripts/guix' and depend
  on 'guix/scripts/$(1).scm' instead of the .go file.

build: Fix instantiation of 'guix-daemon.service' when builddir != srcdir.

* daemon.am (etc/guix-daemon.service): Add $(MKDIR_P) invocation.  Add
  $(srcdir) when referring to the source file.

build: Do not distribute the daemon's 'schema.sql.hh' file.

* daemon.am (libstore_headers): Remove nix/libstore/schema.sql.hh.

build: Build coreutils-size-map.eps for the sake of the PS and DVI outputs.

* doc.am (EXTRA_DIST): Add coreutils-size-map.eps.
  (.png.eps): New rule.
  (ps-local): Add dependency on coreutils-size-map.eps.
  (dvi-local): New target.

build: Add 'generate-authors.scm' to the distribution.

* Makefile.am (EXTRA_DIST): Add build-aux/generate-authors.scm.

build: Adjust 'gen-AUTHORS' for 'distcheck' and when run from a tarball.

* Makefile.am (gen-AUTHORS): Don't do anything if '.git' is missing.  Remove
  "$(distdir)/AUTHORS" before invoking 'generate-authors.scm'.

AUTHORS: Remove the hand-made list of people.

* AUTHORS: Remove the list of people, and add a note saying that this file is
  meant to be generated.

gnu: metabat: Minor tweaks.

* gnu/packages/bioinformatics.scm (metabat)[arguments]: Fix indentation in
  'fix-includes' phase.
  [license]: Fix misspelling.

gnu: Add metabat.

* gnu/packages/bioinformatics.scm (metabat): New variable.

gnu: lxappearance: Add missing slash.

* gnu/packages/lxde.scm (lxappearance)[source]: Add missing slash.

gnu: emacs-mmm-mode: Use gnu-build-system.

* gnu/packages/emacs.scm (emacs-mmm-mode): Replace melpa-stable URL with
  the github URL and use 'gnu-build-system' instead of
  'emacs-build-system'.  Fix typo (add missing space before the
  description).

gnu: mariadb: Update to 10.0.20.

* gnu/packages/databases.scm (mariadb): Update to 10.0.20.

gnu: guile-opengl: Install compiled modules in the correct place.

* gnu/packages/gl.scm (guile-opengl): Install compiled modules in the same
  directory as the source modules.

gnu: crda: Add forgotten patch.

This file should have been added as part of commit cc205da.

* gnu/packages/patches/crda-optional-gcrypt.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.

build-system/ruby: Add #:gem-flags parameter.

* guix/build-system/ruby.scm (build): add 'gem-flags' key
* guix/build/ruby-build-system.scm (build): use 'gem-flags' key
* doc/guix.texi (Build Systems): Mention #:gem-flags.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>

gnu: dfu-programmer: Update to 0.7.2.

* gnu/packages/flashing-tools.scm (dfu-programmer): Update to 0.7.2.  Add
  pkg-config input.

tests: Fix 'publish' test for nix-base32 format.

This is a followup to commit 3b307162e892e0050836434b12e14376758419cc.

* tests/publish.scm ("/*.narinfo"): Use 'bytevector->nix-base32-string',
  not 'bytevector->base32-string'.

gnu packages: Clean up synopses and descriptions.

* gnu/packages/admin.scm, gnu/packages/algebra.scm, gnu/packages/audio.scm,
  gnu/packages/backup.scm, gnu/packages/base.scm, gnu/packages/bittorrent.scm,
  gnu/packages/code.scm, gnu/packages/compression.scm,
  gnu/packages/databases.scm, gnu/packages/enchant.scm,
  gnu/packages/firmware.scm, gnu/packages/fonts.scm,
  gnu/packages/freedesktop.scm, gnu/packages/games.scm, gnu/packages/gd.scm,
  gnu/packages/gl.scm, gnu/packages/gnome.scm, gnu/packages/gsasl.scm,
  gnu/packages/gstreamer.scm, gnu/packages/gtk.scm, gnu/packages/guile.scm,
  gnu/packages/haskell.scm, gnu/packages/language.scm,
  gnu/packages/lesstif.scm, gnu/packages/libreoffice.scm,
  gnu/packages/linux.scm, gnu/packages/llvm.scm, gnu/packages/maths.scm,
  gnu/packages/mcrypt.scm, gnu/packages/mit-krb5.scm, gnu/packages/mp3.scm,
  gnu/packages/ncdu.scm, gnu/packages/networking.scm, gnu/packages/ntp.scm,
  gnu/packages/ocaml.scm, gnu/packages/openbox.scm, gnu/packages/pdf.scm,
  gnu/packages/perl.scm, gnu/packages/pretty-print.scm,
  gnu/packages/pulseaudio.scm, gnu/packages/python.scm,
  gnu/packages/rdesktop.scm, gnu/packages/rdf.scm, gnu/packages/ruby.scm,
  gnu/packages/slang.scm, gnu/packages/slim.scm, gnu/packages/telephony.scm,
  gnu/packages/tls.scm, gnu/packages/tmux.scm, gnu/packages/tre.scm,
  gnu/packages/unrtf.scm, gnu/packages/version-control.scm,
  gnu/packages/vpn.scm, gnu/packages/web.scm, gnu/packages/wget.scm,
  gnu/packages/xdisorg.scm, gnu/packages/xfce.scm, gnu/packages/xiph.scm:
  Fix typos.  Trim long lines.  Add missing periods in the end of sentences.
  Use double spaces between sentences.  Remove trailing whitespaces.

gnu packages: Avoid description lines with leading "(".

* gnu/packages/curl.scm (curl): Reformat description to avoid a line
  beginning with "(" because such lines break font-lock highlighting
  in Emacs.
* gnu/packages/flashing-tools.scm (dfu-programmer): Likewise.
* gnu/packages/games.scm (gnugo): Likewise.
* gnu/packages/gnome.scm (json-glib): Likewise.
* gnu/packages/image.scm (jbig2dec): Likewise.
* gnu/packages/maths.scm (units): Likewise.
* gnu/packages/pdf.scm (mupdf): Likewise.
* gnu/packages/web.scm (perl-encode-locale): Likewise.
* gnu/packages/wordnet.scm (wordnet): Likewise.
* gnu/packages/xml.scm (libxml2):Likewise.