MaimMim Man in the middle minetest interceptor

- prototype
- between client and server, allow to capture all exchanges and potentially change them
- created to capture server maps in laby
- first test get only MapBlock, support version serialization version 28
  - prepartion for 29 with zstd but untested.

fetch_dependencies.sh

@@ -14,6 +14,18 @@ fetch_jackson_databind()
     fi    
 }
 
+fetch_zstd-jni()
+{
+
+    echo "compiled from https://github.com/luben/zstd-jni commit 54d3d50c16d96bd8a30e2d4c0a9648001a52d6f9"
+    # had to hack through jar generation ...
+    # cp ~/artisanlogiciel/ext_projects/java/zstd-jni/target/zstd-jni-1.5.2-2.jar .
+    libversion_zstdjni=1.5.2-2
+    pushd libs    
+    wget https://repo1.maven.org/maven2/com/github/luben/zstd-jni/${libversion_zstdjni}/zstd-jni-${libversion_zstdjni}.jar
+    popd
+}
+
 if [[ ! -d ../sharedrawweb ]]
 then
     echo "[ERROR] expected a sharedrawweb project parent ( for exports )" >&2
@@ -35,3 +47,5 @@ if [[ -n $use_jackson ]]
 then    
     fetch_jackson_databind
 fi
+
+fetch_zstd-jni