resolves py3.x compat issues in tests

fail2ban/server/server.py

@@ -717,7 +717,7 @@ class Server:
 				raise KeyError("unknown option %r" % o)
 
 	def getThreadOptions(self):
-		return {'stacksize': threading.stack_size() / 1024}
+		return {'stacksize': threading.stack_size() // 1024}
 
 	def setDatabase(self, filename):
 		# if not changed - nothing to do

fail2ban/tests/fail2banclienttestcase.py

@@ -479,7 +479,7 @@ class Fail2banClientTest(Fail2banClientServerBase):
 		# use once the stock configuration (to test starting also)
 		startparams = _start_params(tmp, True)
 		# test additional options:
-		_write_file(pjoin(tmp, "config", "fail2ban.conf"), "a",
+		_write_file(pjoin(tmp, "config", "fail2ban.local"), "w",
 			"[Thread]",
 			"stacksize = 32"
 			"",