Moved fuzz dir to test/fuzz

Extended contributing document to testing and licensing

test/fuzz/restconf/README.md

@@ -0,0 +1,31 @@
+# Clixon fuzzing
+
+This dir contains code for fuzzing clixon restconf 
+
+It requires the preeny package to change sockets to stdio. 
+
+## Prereqs
+
+Install AFL and preeny, see [..](..)
+
+Build and install a clixon system (in particular the backend, RESTCONF binary will be replaced)
+
+## Build
+
+Build clixon restconf statically with the afl-clang compiler:
+```
+  CC=/usr/bin/afl-clang-fast LINKAGE=static ./configure --with-restconf=native
+  make clean
+  cd apps/restconf
+  make clixon_restconf
+  sudo make install
+```
+
+## Run tests
+
+Use the script `runfuzz.sh` to run one test:
+```
+  ./runfuzz.sh
+```
+
+After (or during) the test, investigate results in the output dir.