change session name for multiple shops

shop.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # all the imports
-import sqlite3, time, datetime, hashlib, os,re
+import sqlite3, time, datetime, hashlib, os, re
 from shutil import copyfile, move
 from flask import Flask, request, session, g, redirect, url_for, \
      abort, render_template, flash
@@ -21,6 +21,7 @@ CODEFINDER = re.compile(r'\`([^\`]+)\`')
 # create our little application :)
 app = Flask(__name__)
 app.config.from_object(__name__)
+app.config['SESSION_COOKIE_NAME'] = os.getenv('SESSION_COOKIE_NAME', 'mdshop')
 app.wsgi_app = ReverseProxied(app.wsgi_app) 
 
 def connect_db():