gnu: zziplib: Update to 0.13.68.

* gnu/packages/patches/zziplib-CVE-2017-5974.patch,
gnu/packages/patches/zziplib-CVE-2017-5975.patch,
gnu/packages/patches/zziplib-CVE-2017-5976.patch,
gnu/packages/patches/zziplib-CVE-2017-5978.patch,
gnu/packages/patches/zziplib-CVE-2017-5979.patch,
gnu/packages/patches/zziplib-CVE-2017-5981.patch: Delete files.
* gnu/local.mk (dist_patch_DATA): Remove them.
* gnu/packages/compression.scm (zziplib): Update to 0.13.68.
[source](patches): Remove.
[arguments]: Remove #:parallel-tests?.  Set #:tests? #f.

gnu: lunzip: Update to 1.10.

* gnu/packages/compression.scm (lunzip): Update to 1.10.

gnu: p7zip: Fix CVE-2017-17969.

* gnu/packages/patches/p7zip-CVE-2017-17969.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/compression.scm (p7zip)[source]: Use it.

gnu: zstd: Fix typo in comment.

* gnu/packages/compression.scm (zstd)[license]: Fix comment typo.

gnu: Add innoextract.

* gnu/packages/compression.scm (innoextract): New variable.

gnu: iq80-snappy: Improve synopsis & description.

* gnu/packages/compression.scm (iq80-snappy)[synopsis, description]: Fix
typos and add ‘(de)compressor’ keywords.

gnu: lz4: Update to 1.8.1.2.

* gnu/packages/compression.scm (lz4): Update to 1.8.1.2.

gnu: compression, text-editors: Use Savannah mirror://.

* gnu/packages/compression.scm (lunzip, clzip, lzlib, plzip)[source]: Use
mirror:// URI.
* gnu/packages/text-editors.scm (leafpad)[source]: Likewise.

gnu: lz4: Update to 1.8.1.

* gnu/packages/compression.scm (lz4): Update to 1.8.1.
[arguments]: Enable ‘#:parallel-tests?’, now considered safe upstream.
Use ‘more GNU’-style lowercase ‘prefix=’.

gnu: Rename perl-zip to perl-archive-zip.

It's called Archive::Zip, after all.  Bring it in line with other modules.

* gnu/packages/compression.scm (perl-zip): Rename from this...
(perl-archive-zip): ...to this.
* gnu/packages/libreoffice.scm (libreoffice): Update the only caller.

gnu: perl-zip: Update to 1.60.

* gnu/packages/compression.scm (perl-zip): Update to 1.60.
[native-inputs]: Add perl-test-mockmodule.
[home-page]: Use version-independent URL.

gnu: perl-zip: Tweak synopsis & description.

* gnu/packages/compression.scm (perl-zip)[synopsis]: Capitalise consisently.
[description]: Use @code{}.

gnu: bitshuffle: Update to 0.3.4.

* gnu/packages/compression.scm (bitshuffle): Update to 0.3.4.
[arguments]: Delete ‘make-required-dir’ phase that no longer is.

gnu: xdelta: Change to new home page.

The previous used http://xdelta.com is linking to a parked/squatted domain.

* gnu/packages/compression.scm (xdelta)[home-page]: Use http://xdelta.org as
new home page.

gnu: xz: Adjust the home page.

Its http URL permanently redirects to the https one,
throwing off some basic external linters.

* gnu/packages/compression.scm (xz)[home-page]: Adjust home page.

gnu: Add plzip.

* gnu/packages/compression.scm (plzip): New public variable.

gnu: Add lzlib.

* gnu/packages/compression.scm (lzlib): New public variable.

gnu: Add clzip.

* gnu/packages/compression.scm (clzip): New public variable.

gnu: Add lunzip.

* gnu/packages/compression.scm (lunzip): New public variable.

gnu: zstd: Use default ‘check’ target.

* gnu/packages/compression.scm (zstd)[arguments]: Don't set #:test-target.