Fix a typo.
Make debug-int.lisp compilable again.
Rename src/code/eval2/sb-eval2.lisp -> src/code/eval2.lisp.
[eval2] Adapt to SBCL integration.
Store context information in the environment.
[eval2] Improve SBCL integration.
[eval2] Simplify empty environments.
[eval2] Enable the SB!C::STORE-CLOSURE-DEBUG-POINTER compiler policy.
[eval2] Debugger: Handle environment-less frames.
Fix various refactoring errors.
[eval2-debug] Fetch closure if possible.