Prompt or allow for setting Proxy authentication and domain bypasses in MDS config

[Moho Ohalla]

May tie into previous issue request #88 for Imagr system settings.

[Moho Ohalla]

This may not be fix T2 proxy auth issues since EFI updates apparently cannot pass through proxy auth per Apple. The last line of this [apple document]Link TextLink Texthttps://support.apple.com/en-us/HT207567(Link URL) states "Even if you set up a proxy, you won't be able to connect via proxy."

[timothy perfitt]

Not sure if this is even possible.