ignore comment lines in cache file

gwdatafind_server/cache.py

@@ -135,6 +135,8 @@ class CacheManager(FileManager):
 
         with open(self.path, 'rb') as fobj:
             for line in fobj:
+                if line.startswith(b"#"):
+                    continue
                 # parse line
                 site, tag, path, dur, ext, segments = self._parse_line(line)
                 # determine exclusion