Switched well-tested optimizations back on.
Also print stack size in stats.
Print backtrace when starting the debugger/monitor.
Don't expand arguments, take them from the FUNINFO.
Recognize %BACKTRACE-POP as end of function.
Fix GC problem.
devboot: Have assertions in first environment.
releasetests: Don't check debugger (which doesn't exist).
tests: Also make ctests. Don't test the bytecode interpreter.
Minor cleanup.
Smaller GC stacks.