<s>[INST] Create a bash script to back up a directory tree using rsync, but with the following conditions:
- exclude certain directories and files
- include certain directories and files
- preserve timestamps
- compress the data
- specify a maximum transfer rate
- provide a source and destination
- display the start and end times of the backup
- display information about the backup (such as the number of files transferred, etc.)

The script should also be able to handle multiple backup jobs from the same script, by specifying the "job.name" variable. Each job should have its own set of options.

I have the following structure:

    backup.sh
    config/
    jobs/
    logs/

In the `config/` directory, I have a file called `default.conf` with the following format:

    job.name="My Backup Job"
    job.source="/path/to/source"
    job.destination="/path/to/destination"
    job.options="--exclude '/path/to/exclude'"
    job.options+=" --include '/path/to/include'"
    job.options+=" --bwlimit 100"
    job.options+=" --compress"
    job.options+=" --archive"
    job.options+=" --verbose"
    job.options+=" --link-dest /path/to/link-dest"

In the `jobs/` directory, I have one or more job files with the same format as the `default.conf` file. These files will override the default configuration.

Here is a sample job file (`my_job.conf`):

    job.name="My Custom Backup Job"
    job.source="/path/to/my/source"
    job.destination="/path/to/my/destination"
    job.options="--exclude '/path/to/my/exclude'"
    job.options+=" --include '/path/to/my/include'"
    job.options+=" --bwlimit 200"
    job.options+=" --compress"
    job.options+=" --archive"
    job.options+=" --verbose"
    job.options+=" --link-dest /path/to/my/link-dest"

When I run the `backup.sh` script, it should display the start and end times of the backup, as well as display information about the backup (such as the number of files transferred, etc.).

How do I modify the `backup.sh` script to meet these requirements?

Here is a sample `backup.sh` script:

```bash[/INST]