in use address being offered to new host

[bradbeam]

Probably need to double check this, but I think I was running into an issue where coredhcp was offering an already used address when the range was full. I'm not sure if the appropriate behavior is to not send an offer or something else.

[Natolumin]

range is mostly/completely broken. I know @insomniacslk was working on fixing it but it might be worth removing from the default build configuration altogether in the meantime