Increase the max_open_files settings

[stephdl]

When we restart our specific mariadb 105 instance of nextcloud, we have some log traces relative to the maximum number of files.

May 31 17:05:33 ns7loc11 esmith::event[11596]: [INFO] service rh-mariadb105-mariadb@nextcloud restart
May 31 17:05:33 ns7loc11 systemd: Stopping MariaDB 10.5 database server...
May 31 17:05:34 ns7loc11 systemd: Stopped MariaDB 10.5 database server.
May 31 17:05:34 ns7loc11 systemd: Starting MariaDB 10.5 database server...
May 31 17:05:34 ns7loc11 scl: Database MariaDB is probably initialized in /var/opt/rh/rh-mariadb105/lib/mysql-nextcloud already, nothing is done.
May 31 17:05:34 ns7loc11 scl: If this is not the case, make sure the /var/opt/rh/rh-mariadb105/lib/mysql-nextcloud is empty before running mysql-prepare-db-dir.
May 31 17:05:34 ns7loc11 mysqld-scl-helper: 2021-05-31 17:05:34 0 [Note] /opt/rh/rh-mariadb105/root/usr/libexec/mysqld (mysqld 10.5.8-MariaDB) starting as process 12903
 ...
May 31 17:05:34 ns7loc11 mysqld-scl-helper: 2021-05-31 17:05:34 0 [Warning] Could not increase number of max_open_files to more than 1024 (request: 32184)
May 31 17:05:34 ns7loc11 mysqld-scl-helper: 2021-05-31 17:05:34 0 [Warning] Changed limits: max_open_files: 1024  max_connections: 151 (was 151)  table_cache: 421 (was 
2000)
May 31 17:05:34 ns7loc11 systemd: Started MariaDB 10.5 database server.

NethServer/dev#6506

[nethbot]

in 7.9.2009/autobuild:

• nethserver-rh-mariadb105-0.0.1-1.8.pr2.ga8f3af0.ns7.noarch.rpm x86_64 armhfp aarch64

[nethbot]

in 7.9.2009/autobuild:

• nethserver-rh-mariadb105-0.0.1-1.8.pr2.g00ad2e5.ns7.noarch.rpm x86_64 armhfp aarch64