nixos/mediawiki: quote shell flags passed to installer

        ${pkgs.php}/bin/php ${pkg}/share/mediawiki/maintenance/install.php \

          --confpath /tmp \

          --scriptpath / \

          --dbserver "${dbAddr}" \

          --dbserver ${lib.escapeShellArg dbAddr} \

          --dbport ${toString cfg.database.port} \

          --dbname ${cfg.database.name} \

          ${optionalString (cfg.database.tablePrefix != null) "--dbprefix ${cfg.database.tablePrefix}"} \

          --dbuser ${cfg.database.user} \

          ${optionalString (cfg.database.passwordFile != null) "--dbpassfile ${cfg.database.passwordFile}"} \

          --passfile ${cfg.passwordFile} \

          --dbname ${lib.escapeShellArg cfg.database.name} \

          ${optionalString (cfg.database.tablePrefix != null) "--dbprefix ${lib.escapeShellArg cfg.database.tablePrefix}"} \

          --dbuser ${lib.escapeShellArg cfg.database.user} \

          ${optionalString (cfg.database.passwordFile != null) "--dbpassfile ${lib.escapeShellArg cfg.database.passwordFile}"} \

          --passfile ${lib.escapeShellArg cfg.passwordFile} \

          --dbtype ${cfg.database.type} \

          ${cfg.name} \

          ${lib.escapeShellArg cfg.name} \

          admin

        ${pkgs.php}/bin/php ${pkg}/share/mediawiki/maintenance/update.php --conf ${mediawikiConfig} --quick