New upstream release. Addresses:

  CVE-2019-2805
  CVE-2019-2740
  CVE-2019-2739
  CVE-2019-2737
  CVE-2019-2758

Package updates:

  - includes "THIRDPARTY" in PKG_LICENSE_FILES
  - drops client_ed25519 as a dynamic plugin and install it with the lib
    as per upstream decision
  - refreshes patches

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

Many, many bug fixes, see release notes for details:
https://mariadb.com/kb/en/library/mariadb-10219-release-notes/

Fixed CVEs:

  CVE-2018-3282
  CVE-2016-9843
  CVE-2018-3174
  CVE-2018-3143
  CVE-2018-3156
  CVE-2018-3251
  CVE-2018-3185
  CVE-2018-3277
  CVE-2018-3162
  CVE-2018-3173
  CVE-2018-3200
  CVE-2018-3284

OpenWrt package changes:

  - include sha256_password in libmariadb package
  - upstream provided new pkgconfig file libmariadb.pc
  - refreshed one patch, dropped two others (included in upstream source
    now)

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

Bump to 10.2.x release series which has support for OpenSSL 1.1.x.

- libmariadbclient was replaced by libmaria
- libmaria uses LGPL, hence license info updated
- upstream disabled xtradb engine, innodb is now default (cannot be
  built as plugin anymore)
- complex charsets are now all included (size increase), as otherwise
  compile fails
- patches adapted/refreshed

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

MariaDB is a drop-in replacement for MySQL. This commit adds a current
and stable version of MariaDB to the tree.

Quite a few ideas/patches were copied from Alpine Linux, Busybox Buildroot
and Debian.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>