Cobbler's per-MAC gPXE script passed inst.ks.sendmac, making anaconda send
its interface MACs as X-RHN-Provisioning-MAC-N headers when fetching the
kickstart. bootapi's iPXE script omitted it, so the boot script was not a
full drop-in for Cobbler's gpxe output.
- Emit inst.ks.sendmac immediately before inst.ks= in the boot iPXE template,
matching Cobbler ordering.
- Assert the arg is present in the rendered catalog iPXE test.
Claude-Session: https://claude.ai/code/session_01JUoARVdmhxKQHyyyp1pxeT