Fix confdir passing to workers

cista/__main__.py

@@ -50,7 +50,6 @@ def main():
 
 def _main():
     args = docopt(doc)
-    config.init_confdir()
     if args["--user"]:
         return _user(args)
     listen = args["-l"]
@@ -120,7 +119,7 @@ def _confdir(args):
             # Accidentally pointed to the db.toml, use parent
             confdir = confdir.parent
             os.environ["CISTA_HOME"] = confdir.as_posix()
-        config.conffile = confdir / config.conffile.name
+    config.init_confdir()  # Uses environ if available
 
 
 def _user(args):