gnu: check, databases: Use HTTPS for bitbucket.org.

* gnu/packages/check.scm (python-pytest-capturelog)[home-page]: Likewise.
* gnu/packages/databases.scm (python-alembic)[home-page]: Likewise.

gnu: python-redis: Update to 2.10.6.

* gnu/packages/databases.scm (python-redis): Update to 2.10.6.

gnu: python-alembic: Update to 0.9.6.

* gnu/packages/databases.scm (python-alembic): Update to 0.9.6.

gnu: Build wiredtiger with snappy support.

This is probably necessary to get the MongoDB package in Guix to successfully
use the Guix wiredtiger package, as MongoDB it uses wiredtiger with snappy by
default.

* gnu/packages/databases.scm (wiredtiger)[arguments]: Add --enable-snappy to
  #:configure-flags.
  [inputs]: Add snappy.

gnu: mariadb: Update to 10.1.29.

* gnu/packages/databases.scm (mariadb): Update to 10.1.29.

gnu: perl-sql-abstract: Update source uri.

* gnu/packages/databases.scm (perl-sql-abstract)[source]: Update source uri.

gnu: perl-dbd-pg: Update to 3.7.0.

* gnu/packages/databases.scm (perl-dbd-pg): Update to 3.7.0

gnu: perl-sql-abstract: Update to 1.84.

* gnu/packages/databases.scm (perl-sql-abstract): Update to 1.84

gnu: perl-dbix-class-schema-loader: Update to 0.07047.

* gnu/packages/databases.scm (perl-dbix-class-schema-loader): Update to
0.07047

gnu: perl-dbi: Update to 1.637.

* gnu/packages/databases.scm (perl-dbi): Update to 1.637

gnu: mongodb: Use scons-build-system.

* gnu/packages/databases.scm (mongodb): Switch to scons-build-system.

gnu: mongodb: Remove some bundled sources.

* gnu/packages/databases.scm (mongodb)[source]: Add snippet to remove
some of the bundled sources.
[input]: Remove unused boost input.

gnu: mongodb: Use system wiredtiger when available.

* gnu/packages/databases.scm (mongodb)[inputs]: Add wiredtiger on
64-bit systems.
[arguments]: When using wiredtiger, use system wiredtiger.

gnu: mongodb: Build without wiredtiger on 32-bit systems.

* gnu/packages/databases.scm (mongodb)[arguments]: Add a configure-flag
to build without wiredtiger support on 32-bit systems.

gnu: mongodb: Update to 3.4.10.

* gnu/packages/databases.scm (mongodb): Update to 3.4.10.

gnu: Add python-pyodbc.

* gnu/packages/databases.scm (python-pyodbc, python2-pyodbc): New variables.

gnu: Move database packages from python.scm to databases.scm.

* gnu/packages/python.scm (python-ccm, python2-ccm, python2-pysqlite,
python-sqlalchemy, python2-sqlalchemy, python-sqlalchemy-utils,
python2-sqlalchemy-utils, python-alembic, python2-alembic,
python-pickleshare, python2-pickleshare, python-apsw, python2-apsw,
python2-neo4j-driver, python2-py2neo, python-psycopg2, python2-psycopg2,
python-sadisplay, python2-sadisplay, python-mysqlclient,
python2-mysqlclient, python-hiredis, python2-hiredis, python-fakeredis,
python2-fakeredis, python-redis, python2-redis, python-rq, python2-rq,
python-trollius-redis, python2-trollius-redis, python-sqlparse,
python2-sqlparse, python-sql, python2-sql): Move from here...
* gnu/packages/databases.scm: ...to here.
* gnu/packages/tryton.scm,
gnu/packages/python-web.scm,
gnu/packages/nutrition.scm,
gnu/packages/medical.scm: Adjust accordingly.

gnu: Add guile-wiredtiger.

* gnu/packages/databases.scm (guile-wiredtiger): New variable.

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

gnu: Move test packages from perl to perl-check.

* gnu/packages/perl.scm (perl-test2-bundle-extended,
perl-test2-plugin-nowarnings, perl-test-base, perl-test-class,
perl-test-class-most, perl-test-cleannamespaces, perl-test-command,
perl-test-cpan-meta, perl-test-cpan-meta-json, perl-test-deep,
perl-test-differences, perl-test-directory, perl-test-eol,
perl-test-exception, perl-test-fatal, perl-test-file-sharedir-dist,
perl-test-files, perl-test-harness, perl-test-leaktrace,
perl-test-longstring, perl-test-manifest, perl-test-memory-cycle,
perl-test-mockobject, perl-test-mocktime, perl-test-most, perl-test-needs,
perl-test-notabs, perl-test-nowarnings, perl-test-number-delta,
perl-test-output, perl-test-pod, perl-test-pod-coverage, perl-test-requires,
perl-test-script, perl-test-sharedfork, perl-test-simple, perl-test-taint,
perl-test-tester, perl-test-trap, perl-test-utf8, perl-test-warn,
perl-test-warnings, perl-test-without-module, perl-test-writevariants,
perl-test-yaml, perl-test-trailingspace): Move variables to ...
* gnu/packages/perl-check.scm: ... this new file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* gnu/packages/admin.scm,
gnu/packages/bioinformatics.scm,
gnu/packages/crypto.scm,
gnu/packages/databases.scm,
gnu/packages/glib.scm,
gnu/packages/gnupg.scm,
gnu/packages/image-viewers.scm,
gnu/packages/language.scm,
gnu/packages/networking.scm,
gnu/packages/package-management.scm,
gnu/packages/perl.scm,
gnu/packages/terminals.scm,
gnu/packages/tex.scm,
gnu/packages/version-control.scm,
gnu/packages/web.scm,
gnu/packages/xml.scm,
gnu/packages/xorg.scm: Use perl-check module.

gnu: postgresql@9.6: Update to 9.6.6 [security fixes].

This fixes CVE-2017-12172, CVE-2017-15098, CVE-2017-15099.

* gnu/packages/databases.scm (postgresql@9.6): Update to 9.6.6.