add AFL_NO_CFG_FUZZING to env list

TODO.md

@@ -2,6 +2,7 @@
 
 ## Should
 
+ - cmplog rtn sanity check on fixed length
  - afl-showmap -f support
  - afl-fuzz multicore wrapper script
  - add value_profile but only enable after 15 minutes without finds

include/envs.h

@@ -179,6 +179,7 @@ static char *afl_environment_variables[] = {
     "AFL_NO_COLOUR",
 #endif
     "AFL_NO_CPU_RED",
+    "AFL_NO_CFG_FUZZING",  // afl.rs rust crate option
     "AFL_NO_CRASH_README",
     "AFL_NO_FORKSRV",
     "AFL_NO_UI",