deploy: in fact, we do not want to use rsync --archive ...

... since both machines do not share the user names, groups, umasks, etc.

conf.py

@@ -416,8 +416,8 @@ REDIRECTIONS = []
 # in a `nikola deploy` command as you like.
 DEPLOY_COMMANDS = {
     'default': [
-        "rsync -rav -e 'ssh -i deploy_key' --delete --filter 'P doc/*' output/* kwant@kwant-project.org:",
-        "rsync -av -e 'ssh -i deploy_key' htaccess-apache kwant@kwant-project.org:/.htaccess",
+        "rsync -rlv -e 'ssh -i deploy_key' --delete --filter 'P doc/*' output/* kwant@kwant-project.org:",
+        "rsync -lv -e 'ssh -i deploy_key' htaccess-apache kwant@kwant-project.org:/.htaccess",
     ]
 }