Revert pull request #427.

Reverts c811d87, 090a4ab, 253322a, and e86cc03, part of pull
request #427, in favor of resolving issue #473.

This removes the `CONFIG_START` and `CONFIG_END` macros in the hopes of
adding them again, after further testing, at a later date.
Merge pull request #477 from modocache/revert-pull-request-427

Revert pull request #427.