Update to the latest stable version of MariaDB. Dropped few no longer
needed patches.

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

The crude loop I wrote to come up with this changeset:

  find -L package/feeds/packages/ -name patches | \
  sed 's/patches$/refresh/' | sort | xargs make

Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>

Fixes CVE-2020-2574.

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

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>