Improve or remove the CFG_INSTALL_SNAP logic

[graydon]

As per fixme, it's kinda hacky.

Could I get some direction on this?

[pcwalton]

I don't believe this is backwards incompatible, renominating.

[graydon]

just a bug, removing milestone/nomination.

[graydon]

consensus is remove, it's not used / nobody knows what it's for

[graydon]

It's removed, just didn't auto-close. Closing.