Fix 3420 - fixed syntax errors in certwatcher.py

(cherry picked from commit c4f457e7f9)

core/nginx/certwatcher.py

@@ -27,9 +27,9 @@ class ChangeHandler(FileSystemEventHandler):
         if exists("/var/run/nginx.pid"):
             print("Reloading a running nginx")
             system("nginx -s reload")
-        if os.path.exists("/run/dovecot/master.pid"):
+        if exists("/run/dovecot/master.pid"):
             print("Reloading a running dovecot")
-            os.system("doveadm reload")
+            system("doveadm reload")
 
     @staticmethod
     def reexec_config():

towncrier/newsfragments/3420.bugfix

@@ -0,0 +1 @@
+The reload functionality of nginx/dovecot upon change of the certificates failed with an error.