Vendor cgminer source, patch for SHA256, update installer

update.sh

@@ -51,6 +51,21 @@ chown -R $USER:$USER "$TARGET_DIR"
 echo "=== Aktualisiere Service-Definitionen ==="
 # Wir schreiben die Services neu, falls sich im Repo die Startlogik geändert hat
 
+# Optional: Rebuild cgminer if requested
+if [ "$1" == "--rebuild-miner" ]; then
+    echo "=== Recompiling Miner from Local Source ==="
+    # Reuse logic from install.sh essentially
+    cp -r src/cgminer-gc3355 /tmp/cgminer-build
+    cd /tmp/cgminer-build
+    export CFLAGS="-fcommon -O2"
+    ./autogen.sh
+    ./configure --enable-gridseed --enable-scrypt --without-curses
+    make -j1
+    make install
+    cd "$TARGET_DIR"
+    rm -rf /tmp/cgminer-build
+fi
+
 # GUI Service
 cat <<EOF > /etc/systemd/system/necrohash-gui.service
 [Unit]