client: read_cfg handling of relative paths changed

read_cfg() no longer add directory of warden_client.py in front of the config file name. It simply opens the path/filename passed. This allows to install warden_client.py to system paths and use relative paths to config files, but IT MAY BROKE SOME EXISTING INSTALLATIONS if they use relative path to config file and run script from different directory than where warden_client.py is located.

warden3/warden_client/warden_client.py

@@ -662,7 +662,6 @@ def format_time(year, month, day, hour, minute, second, microsec=0, utcoffset=No
 
 
 def read_cfg(cfgfile):
-    abspath = path.join(path.dirname(__file__), cfgfile)
-    with open(abspath, "r") as f:
+    with open(cfgfile, "r") as f:
         stripcomments = "\n".join((l for l in f if not l.lstrip().startswith(("#", "//"))))
         return json.loads(stripcomments)