fix logging and configfile location on freebsd

bin/zsnapper

@@ -288,7 +288,8 @@ def weed_snapshots(fslist, snapshots, config, failed_snapshots):
 
 def main():
     config = configparser.ConfigParser()
-    config.read('/etc/zsnapper.ini')
+    config.read('/usr/local/etc/zsnapper.ini', '/etc/zsnapper.ini')
+
     ret = RET_CODES['SUCCESS']
     log = logging.getLogger(LOGGER)
 
@@ -403,9 +404,22 @@ if __name__ == '__main__':
     handler.setLevel(logging.WARNING)
     log.addHandler(handler)
 
-    handler = logging.handlers.SysLogHandler(address='/dev/log')
+    handler = None
+    for logsocket in ('/var/run/log', '/dev/log'):
+        try:
+            mode = os.stat(logsocket).st_mode
+        except FileNotFoundError:
+            continue
+
+        if stat.S_ISSOCK(mode):
+            handler = logging.handlers.SysLogHandler(address=logsocket)
             formatter = logging.Formatter(fmt='zsnapper[%(process)s] %(message)s')
             handler.setFormatter(formatter)
             handler.setLevel(logging.INFO)
             log.addHandler(handler)
+            break
+
+    if not handler:
+        log.warning('No syslog socket found, will not log to syslog')
+
     sys.exit(main())