Make client caches respect CLIENT_HOME

src/ZEO/ClientCache.py

@@ -144,7 +144,7 @@ file 0 and file 1.
 
 """
 
-__version__ = "$Revision: 1.13 $"[11:-2]
+__version__ = "$Revision: 1.14 $"[11:-2]
 
 import os, tempfile
 from struct import pack, unpack
@@ -164,8 +164,10 @@ class ClientCache:
         if client:
             # Create a persistent cache
             if var is None:
-                try: var=os.path.join(INSTANCE_HOME,'var')
-                except: var=os.getcwd()
+                try: var=CLIENT_HOME
+                except:
+                    try: var=os.path.join(INSTANCE_HOME,'var')
+                    except: var=os.getcwd()
 
             # Get the list of cache file names
             self._p=p=map(lambda i, p=storage, var=var, c=client: