Fixes <https://bugs.gnu.org/32467>.
Reported by Björn Höfling <bjoern.hoefling@bjoernhoefling.de>.
* gnu/packages/photo.scm (libraw-0.18): New variable.
* gnu/packages/kde.scm (krita)[inputs]: Use libraw-0.18.
The venerable search.cpan.org has retired[0].
[0]: https://log.perl.org/2018/05/goodbye-search-dot-cpan-dot-org.html
* guix/import/cpan.scm (cpan-home): Generate metacpan.org home page URIs.
Update all previously generated ones in (gnu packages) to their
canonical new homes.
* gnu/packages/patches/libexif-CVE-2016-6328.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/photo.scm (libexif)[source]: Use it.
* gnu/packages/patches/libexif-CVE-2017-7544.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/photo.scm (feh)[source]: Use it.