gnu: perl-xml-libxml-simple: Update to 0.97.

* gnu/packages/xml.scm (perl-xml-libxml-simple): Update to 0.97.

gnu: perl-graph-readwrite: Update to 2.09.

* gnu/packages/xml.scm (perl-graph-readwrite): Update to 2.09.

gnu: perl-dbd-sqlite: Update to 1.52.

* gnu/packages/databases.scm (perl-dbd-sqlite): Update to 1.52.

gnu: perl-dbix-class-schema-loader: Update to 0.07046.

* gnu/packages/databases.scm (perl-dbix-class-schema-loader):
Update to 0.07046.

gnu: perl-dbix-class-introspectablem2m: Update to 0.001002.

* gnu/packages/databases.scm (perl-dbix-class-introspectablem2m):
Update to 0.001002.

gnu: perl-dbix-class-cursor-cached: Update to 1.001004.

* gnu/packages/databases.scm (perl-dbix-class-cursor-cached):
Update to 1.001004.

gnu: perl-dbix-class: Update to 0.082840.

* gnu/packages/databases.scm (perl-dbix-class): Update to 0.082840.

gnu: perl-email-simple: Update to 2.211.

* gnu/packages/mail.scm (perl-email-simple): Update to 2.211.

gnu: perl-namespace-autoclean: Update to 0.28.

* gnu/packages/perl.scm (perl-namespace-autoclean): Update to 0.28.

gnu: perl-class-method-modifiers: Update to 2.12.

* gnu/packages/perl.scm (perl-class-method-modifiers): Update to 2.12.

gnu: perl-email-mime-contenttype: Update to 1.018.

* gnu/packages/mail.scm (perl-email-mime-contenttype): Update to 1.018.

gnu: perl-email-mime: Update to 1.937.

* gnu/packages/mail.scm (perl-email-mime): Update to 1.937.

gnu: perl-email-messageid: Update to 1.406.

* gnu/packages/mail.scm (perl-email-messageid): Update to 1.406.

gnu: perl-email-address: Update to 1.908.

* gnu/packages/mail.scm (perl-email-address): Update to 1.908.

gnu: iw: Update to 4.9.

* gnu/packages/linux.scm (iw): Update to 4.9.

gnu: pciutils: Update to 3.5.2.

* gnu/packages/pciutils.scm (pciutils): Update to 3.5.2.

refresh: '--list-updaters' shows updater coverage.

* guix/scripts/refresh.scm (list-updaters-and-exit): Compute the
coverage ratio of each updater and print it.  Print the coverage ratio
for all the updaters.
* doc/guix.texi (Invoking guix refresh): Document it.

gnu-maintenance: Add kernel.org updater.

* guix/gnu-maintenance.scm (latest-kernel.org-release): New procedure.
(%kernel.org-updater): New variable.
* guix/scripts/refresh.scm (%updaters): Add it.

upstream: Properly verify signatures of uncompressed tarballs.

* guix/upstream.scm (uncompressed-tarball): New procedure.
(download-tarball): Use it when the basename of SIGNATURE-URL doesn't
contain the basename of URL.

refresh: Honor the selected updaters when '-u' isn't given.

Fixes a regression introduced in
e9c72306fdfd6a60158918850cb25d0ff3837d16.

* guix/scripts/refresh.scm (check-for-package-update): Add 'updaters'
parameter and honor it.
(guix-refresh): Pass UPDATERS to 'check-for-package-update'.