permit personalisation of wsgidav config path

tracim/development.ini.base

 ## in this case, you have to create your own proxy behind this url.
 # radicale.client.base_url = http://127.0.0.1:5232
 
+## WSGIDAV
+wsgidav.config_path = wsgidav.conf
+
 #####
 #
 # All configuration below is about logging.

tracim/tracim/config/app_cfg.py

             '604800',
         ))
 
+        self.WSGIDAV_CONFIG_PATH = tg.config.get('wsgidav.config_path')
+
     def get_tracker_js_content(self, js_tracker_file_path = None):
         js_tracker_file_path = tg.config.get('js_tracker_path', None)
         if js_tracker_file_path:

tracim/tracim/lib/daemons.py

 
     def _initConfig(self):
         """Setup configuration dictionary from default, command line and configuration file."""
+        from tg import config as tg_config
 
         # Set config defaults
         config = DEFAULT_CONFIG.copy()
         temp_verbose = config["verbose"]
 
         # Configuration file overrides defaults
-        config_file = os.path.abspath(DEFAULT_CONFIG_FILE)
+        default_config_file = os.path.abspath(DEFAULT_CONFIG_FILE)
+        config_file = tg_config.get('wsgidav.config_path', default_config_file)
         fileConf = self._readConfigFile(config_file, temp_verbose)
         config.update(fileConf)