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f1beb79429
At startup, the leases file is read by lease_init(), and in lease_init() undecorated hostnames are expanded into FQDNs by adding the domain associated with the address of the lease. lease_init() happens relavtively early in the startup, party because if it calls the dhcp-lease helper script, we don't want that to inherit a load of sensitive file descriptors. This has implications if domains are defined using the --domain=example.com,eth0 format since it's long before we call enumerate_interfaces(), so get_domain fails for such domains. The patch just moves the hostname expansion function to a seperate subroutine that gets called later, after enumerate_interfaces().