- Use 'pihole setpassword' for v6, fallback to '-a -p' for legacy
- Update management script with v6 password syntax
- Update README with v6 commands
- Tested successfully on Rocky Linux 10.1
- Add handle_selinux() function to detect and configure SELinux
- In unattended mode, automatically set SELinux to permissive
- In interactive mode, prompt user for SELinux configuration
- Add --no-selinux option to skip SELinux handling
- Export PIHOLE_SELINUX=true if user wants to keep enforcing mode