Migrated some routes to POST

- delete shelf, import ldap users
- delete_kobo token, kobo force full sync
- shutdown, reconnect, shutdown

cps/web.py

@@ -1055,7 +1055,8 @@ def get_tasks_status():
     return render_title_template('tasks.html', entries=answer, title=_(u"Tasks"), page="tasks")
 
 
-@app.route("/reconnect")
+# method is available without login and not protected by CSRF to make it easy reachable
+@app.route("/reconnect", methods=['GET'])
 def reconnect():
     calibre_db.reconnect_db(config, ub.app_DB_path)
     return json.dumps({})
@@ -1435,7 +1436,7 @@ def download_link(book_id, book_format, anyname):
     return get_download_link(book_id, book_format, client)
 
 
-@web.route('/send/<int:book_id>/<book_format>/<int:convert>')
+@web.route('/send/<int:book_id>/<book_format>/<int:convert>', methods=["POST"])
 @login_required
 @download_required
 def send_to_kindle(book_id, book_format, convert):