Update to the latest version from 10.4 series

Signed-off-by: Michal Hrusecky <michal.hrusecky@turris.com>

Highlights:

- Bump from 10.2.26 to 10.4.10
- auth_pam got replaced with never version, old one still available as
  auth_pam_v1
- semisync plugins were merged into the core
- Upstream now installs symlinks for binaries with mariadb prefix. To
  accommodate that this commit updates Package/mariadb/install/bin
  accordingly.
- Patches are updated with new ones from Debian and Arch (thanks!)
- libedit patch dropped because it's upstream now.

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

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>

From Release Notes:

  Security

    MDEV-18686 - Add option to PAM authentication plugin to allow case insensitive username matching
    bugfix - multi-update checked privileges on views incorrectly (commit 5057d46375)
    MDEV-19276 - during connect, write error log warning for ER_DBACCESS_DENIED_ERROR, if log_warnings > 1
    MDEV-17456 - Malicious SUPER user can possibly change audit log configuration without leaving traces.

    Fixes for the following security vulnerabilities:
        CVE-2019-2614
        CVE-2019-2627
        CVE-2019-2628

OpenWrt changes:

  - added PKG_CPE_ID
  - shortened default description to make "opkg info" output easier on the eyes
  - refreshed patches

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>