Retain chat status during pleroma upgrades

src/freedombone-app-pleroma

         pleroma_registrations=
     fi
 
+    pleroma_chat_enabled=1
+    if grep -q ':chat, enabled: false' $PLEROMA_DIR/config/config.exs; then
+        pleroma_chat_enabled=
+    fi
+
     # make a copy of the configuration
     cp $PLEROMA_DIR/priv/static/static/config.json $PLEROMA_DIR/priv/static/static/config_prev.json
 
         sed -i 's|registrations_open: True|registrations_open: false|g' $PLEROMA_DIR/config/config.exs
     fi
 
+    if [ ! $pleroma_chat_enabled ]; then
+        sed -i 's|config :pleroma, :chat.*|config :pleroma, :chat, enabled: false|g' $PLEROMA_DIR/config/config.exs
+    else
+        sed -i 's|config :pleroma, :chat.*|config :pleroma, :chat, enabled: true|g' $PLEROMA_DIR/config/config.exs
+    fi
+
     pleroma_recompile
 
     # migrate database