gnu: v4l-utils: Build with qtbase.

* gnu/packages/video.scm (v4l-utils)[inputs]: Remove qt, add qtbase.

gnu: obs: Build with modular qt.

* gnu/packages/video.scm (obs)[inputs]: Remove qt, add qtbase, qtx11extras.

gnu: services: Add mysql-service.

* gnu/services/database.scm (<mysql-configuration>): New record type.
(%mysql-accounts, mysql-service-type): New variables.
(mysql-configuration-file, %mysql-activation, mysql-shepherd-services)
(mysql-services): New procedures.
* doc/guix.texi (Database Services): Document it.

gnu: mariadb: Update to 10.1.14.

* gnu/packages/databases.scm (mariadb): Update to 10.1.14.

packages: Disambiguate 'modules' and 'imported-modules' in <origin>.

The two mistakes made here (confusion between 'modules' and
'imported-modules') were canceling each other.

* guix/packages.scm (patch-and-repack): Use IMPORTED-MODULES, not
MODULES, as the base of the module list passed as #:modules to
'gexp->derivation'.
(origin->derivation): Pass IMPORTED-MODULES, not MODULES, as
the #:imported-modules argument of 'patch-and-repack'.
* gnu/packages/engineering.scm (fastcap)[source]: Add 'imported-modules'
field.

gnu: Add awesome.

* gnu/packages/wm.scm (awesome): New variable.
* gnu/packages/patches/awesome-reproducible-png.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

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

gnu: perl-test-simple: Update to 1.302026.

* gnu/packages/perl.scm (perl-test-simple): Update to 1.302026.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu: Avoid #:prefix when importing (gnu packages …).

* gnu/packages/lsh.scm: Remove #:prefix for (gnu packages compression).
Add #:prefix for (guix licenses).

gexp: Add 'local-file' file name resolution test.

* tests/gexp.scm ("local-file, relative file name"): New test.

gexp: Add #:select? parameter to 'local-file'.

* guix/gexp.scm (<local-file>)[select?]: New field.
(true): New procedure.
(%local-file): Add #:select? and honor it.
(local-file): Likewise.
* tests/gexp.scm ("local-file, #:select?"): New test.
* doc/guix.texi (G-Expressions): Adjust accordingly.

gexp: Move 'current-source-directory' to (guix utils).

* guix/gexp.scm (extract-directory, current-source-directory): Move to...
* guix/utils.scm (extract-directory, current-source-directory):
... here.  New procedures.

doc: Fix typos.

Reported by ozzloy on #guix.

* doc/guix.texi (package Reference): Add missing space.
(G-Expressions, Invoking guix build):
(Common Build Options): Fix typos.

gnu: avidemux: Update to 2.6.12.

* gnu/packages/video.scm (avidemux): Update to 2.6.12.
[arguments]: Adapt version number of bundled ffmpeg.

gnu: offlineimap: Update to 6.7.0.1.

* gnu/packages/mail.scm (offlineimap): Update to 6.7.0.1.

gnu: oxygen-icons: Build with qtbase.

* gnu/packages/kde-frameworks.scm (oxygen-icons)[inputs]: Remove qt,
add qtbase.

gnu: Add gnome-maps.

* gnu/packages/geo.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

gnu: Add gfbgraph.

* gnu/packages/gnome.scm (gfbgraph): New variable.

gnu: libchamplain: Build Vala bindings.

* gnu/packages/gnome.scm (libchamplain)[native-inputs]: Add
gobject-introspection, vala.
[arguments]: New field.

gnu: vala: Build Vala API (.vapi) generator.

* gnu/packages/gnome.scm (vala)[arguments]: Pass --enable-apigen
to #:configure-flags.

gnu: Add folks.

* gnu/packages/gnome.scm (folks): New variable.