Evaluate module paths relative to the config file or the code path

http2irc.py

@@ -153,8 +153,14 @@ class Config(dict):
 					if isinstance(map_['auth'], str) and ':' not in map_['auth']:
 							raise InvalidConfig(f'Invalid map {key!r} auth: must contain a colon')
 
-				if 'module' in map_ and not os.path.isfile(map_['module']):
-					raise InvalidConfig(f'Module {map_["module"]!r} in map {key!r} is not a file')
+				if 'module' in map_:
+					# If the path is relative, try to evaluate it relative to either the config file or this file; some modules are in the repo, but this also allows overriding them.
+					for basePath in (os.path.dirname(self._filename), os.path.dirname(__file__)):
+						if os.path.isfile(os.path.join(basePath, map_['module'])):
+							map_['module'] = os.path.abspath(os.path.join(basePath, map_['module']))
+							break
+					else:
+						raise InvalidConfig(f'Module {map_["module"]!r} in map {key!r} is not a file')
 				if 'moduleargs' in map_:
 					if not isinstance(map_['moduleargs'], list):
 						raise InvalidConfig(f'Invalid module args for {key!r}: not an array')