Use bootloader_filename instead of site_name for bootloader filenames consistently

[abh]

Fixes #1095

[abh]

I didn't change the template for the checksum file as that using site_name seemed like it might be intentionally different.

For these files the filename generated was already using bootloader_filename and the references I changed were to match the actual files.

[github-actions[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[abh]

Uh, not sure what's expected here. Bad bot?

[github-actions[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[abh]

ping @antonym

[guppy0130]

I've tried this patch and the following is an example diff in the outputted index.html:

         <tr>
        <td> DHCP-snponly </td>
-       <td> <a href="ipxe/netboot.chicago.inthemainfra.me-snponly.efi">netboot.chicago.inthemainfra.me-snponly.efi</a> </td>
+       <td> <a href="ipxe/netboot.xyz-snponly.efi">netboot.xyz-snponly.efi</a> </td>
        <td> EFI w/ Simple Network Protocol, only boots from device chained from </td>
     </tr>

which matches the contents of the ipxe/ directory correctly:

(netboot.xyz) nyang@omada:~/src/netboot.xyz$ ls buildout/ipxe/
netboot.chicago.inthemainfra.me-sha256-checksums.txt  netboot.xyz.dsk  netboot.xyz.efi  netboot.xyz.kpxe  netboot.xyz.lkrn  netboot.xyz.pdsk  netboot.xyz-snp.efi  netboot.xyz-snponly.efi  netboot.xyz-undionly.kpxe

where netboot.chicago.inthemainfra.me is the site_name. I think this PR is great as-is if the goal is to have valid links/references. could this get merged @antonym ?

[abh]

thanks @antonym :-)