Moved fuzz dir to test/fuzz

Extended contributing document to testing and licensing

test/fuzz/cli/README.md

@@ -0,0 +1,61 @@
+# Clixon fuzzing
+
+This dir contains code for fuzzing clixon cli. 
+
+## Prereqs
+
+Install AFL, see [..](..)
+
+Build and install a clixon system (in particular the backend, the CLI will be replaced)
+
+Build and install CLIgen statically:
+```
+  ./configure LINKAGE=static INSTALLFLAGS="" CC=/usr/bin/afl-clang-fast
+```
+
+## Build
+
+Build clixon cli statically with the afl-clang compiler:
+
+```
+  CC=/usr/bin/afl-clang-fast LINKAGE=static INSTALLFLAGS="" ./configure # Dont care about restconf
+  make clean
+  cd apps/cli
+  make clixon_cli
+  sudo make install
+```
+
+To link an example plugin properly it gets a little more complex::
+
+- First, you need to identify which example plugins you want to link. Add these to `EXTRAS` variable
+- Configure and compile those plugins, where the `clixon_plugin_init()` function is removed.
+- Configure and compile the cli WITH the `EXTRAS` variable set.
+
+Below is an example of how to do this for the main example. You can replace the main example plugins with another application:
+```
+  CC=/usr/bin/afl-clang-fast CFLAGS="-O2 -Wall -DCLIXON_STATIC_PLUGINS" LINKAGE=static INSTALLFLAGS="" ./configure
+
+  make clean
+  make
+  sudo make install
+  
+  cd example # Compile and install application plugins (here main example)
+  make clean
+  make
+  sudo make install 
+  cd ..
+
+  cd apps/cli # Compile and install clixon_cli with pre-compiled plugins
+  rm clixon_cli
+  EXTRAS="../../example/main/example_cli.o" make clixon_cli
+  sudo make install
+```
+
+## Run tests
+
+Run the script `runfuzz.sh` to run one test with a cli spec and an input string, eg:
+```
+  ./runfuzz.sh
+```
+
+After (or during) the test, investigate results in the output dir.