allow -L -1 to enable mopt in parallel to classic mutation

docs/Changelog.md

@@ -17,6 +17,8 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
   - afl-fuzz:
     - variable map size support added (only LTO mode can use this)
     - snapshot feature usage now visible in UI
+    - Now setting "-L -1" will enable MOpt in parallel to normal mutation.
+      Additionally this allows to run dictionaries, radamsa and cmplog.
   - compare-transform/AFL_LLVM_LAF_TRANSFORM_COMPARES now transforms also
     static global and local variable comparisons (cannot find all though)
   - extended forkserver: map_size and more information is communicated to

docs/README.MOpt.md

@@ -36,6 +36,9 @@ enter the pacemaker fuzzing mode.
 Setting 0 will enter the pacemaker fuzzing mode at first, which is
 recommended in a short time-scale evaluation. 
 
+Setting -1 will enable both pacemaker mode and normal aflmutation fuzzing in
+parallel.
+
 Other important parameters can be found in afl-fuzz.c, for instance, 
 
 'swarm_num': the number of the PSO swarms used in the fuzzing process.