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.

# Conflicts:
#	fetch_dependencies.sh

fetch_dependencies.sh

@@ -28,12 +28,24 @@ 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 .
+    pushd libs    
+    wget https://repo1.maven.org/maven2/com/github/luben/zstd-jni/${libversion_zstdjni}/zstd-jni-${libversion_zstdjni}.jar
+    popd
+}
+
+libversion_zstdjni=1.5.2-2
 libversion_jackson_databind=2.12.0
 sharedrawweb_git_url="ssh://philippe@www4.artisanlogiciel.net:2023/home/philippe/artisanlogiciel/code/sharedrawweb"
 libversion_artgaphic=0.2.0
 lib_artgaphic=artgaphics-${libversion_artgaphic}.jar
 
+
 if [[ ! -d ../sharedrawweb ]]
 then
     log_error "expected a sharedrawweb project parent ( for exports ). Please clone related project."
@@ -61,3 +73,8 @@ if [[ -n $use_jackson ]]
 then    
     fetch_jackson_databind
 fi
+
+if [[ -n $use_zstd ]]
+then
+    fetch_zstd-jni
+fi