Beta Branch update addons/opendkim.sh script in 140.00beta01

update addons/opendkim.sh script in 140.00beta01

- update opendkim key generation from 1024bit to 2048bit key length by default
- add configurable DKIM selector name which defaults to default2024 where 2024 is the year
CURRENT_YEAR=$(date +"%Y")
SELECTOR="default${CURRENT_YEAR}"
- add a --force option to the addons/opendkim.sh script, enabling forced regeneration of DKIM keys and backing up existing keys and configurations to /etc/centminmod/dkim_backups.

To force the regeneration of DKIM keys for the main hostname and backup existing keys:

./opendkim.sh --force

To force update DKIM keys for a specific domain (e.g., example.com) and backup existing keys:

./opendkim.sh --force example.com

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By using the --force option, the script will:

1. Regenerate DKIM keys even if they already exist.
2. Backup existing DKIM keys and configurations before making changes.
3. Store backups in a timestamped directory under /etc/centminmod/dkim_backups.
4. Note: Remember to update your DNS records with the new DKIM public keys after running the script with --force.

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140.00beta01 branch

• Branch: https://github.com/centminmod/centminmod/tree/140.00beta01
• Commit History: https://github.com/centminmod/centminmod/commits/140.00beta01