Merge branch 'master' into core-updates

Conflicts:
	gnu-system.am

gnu: Adjust synopses as recommended by 'guix lint'.

Remove leading articles and trailing periods in package synopses.

gnu: Synchronize GNU package descriptions with upstream.

These are mostly two-space-after-end-of-sentence-period changes
resulting from commit 3a09e1d2.

Merge branch 'master' into core-updates

Conflicts:
	gnu/packages/image.scm

gnu: Add tdb.

* gnu/packages/databases.scm (tdb): New variable.

gnu: Consolidate databases in (gnu packages databases).

* gnu/packages/databases.scm: New file, with the contents of the
  following deleted files.
* gnu/packages/mysql.scm, gnu/packages/postgresql.scm,
  gnu/packages/recutils.scm, gnu/packages/sqlite.scm,
  gnu/packages/bdb.scm: Remove.
* gnu-system.am (GNU_SYSTEM_MODULES): Adjust accordingly.
* gnu/packages/apl.scm, gnu/packages/dc.scm, gnu/packages/games.scm,
  gnu/packages/gnunet.scm, gnu/packages/linux.scm, gnu/packages/mail.scm,
  gnu/packages/mpd.scm, gnu/packages/nvi.scm, gnu/packages/openldap.scm,
  gnu/packages/package-management.scm, gnu/packages/python.scm,
  gnu/packages/qt.scm, gnu/packages/rdf.scm,
  gnu/packages/version-control.scm: Adjust to new module name.

Merge branch 'master' into core-updates

gnu: mysql: Update to 5.1.73.

* gnu/packages/mysql.scm (mysql): Update to 5.1.73.  Update source URI.

distro: Rename (distro) to (gnu packages).

* distro.scm: Rename to...
* gnu/packages.scm: ... this.  Update all users accordingly.
* Makefile.am (MODULES): Adjust accordingly.
* po/POTFILES.in: Likewise.

distro: Change the module name space to (gnu ...).

* distro: Rename to...
* gnu: ... this.  Update module names accordingly.
* Makefile.am: Adjust accordingly.
* po/POTFILES.in: Likewise.
* distro.scm: Search for files under /gnu/packages instead of
  /distro/packages.
* gnu/packages/base.scm (ld-wrapper-boot3): Likewise.

distro: Add MySQL.

* distro/packages/mysql.scm: New file.
* Makefile.am (MODULES): Add it.