Fixed Exception creating link

OTcerts.py

@@ -159,7 +159,7 @@ def acme_request(config, domain_name, acme_test='DNS-01', dryrun=False, domains_
 def symlink_force(target, link_name):
     try:
         os.symlink(target, link_name)
-    except e:
+    except Exception as e:
         if e.errno == errno.EEXIST:
             os.remove(link_name)
             os.symlink(target, link_name)