look for ZEXP imports in the clienthome dir too

doc/CHANGES.txt

@@ -8,6 +8,10 @@ Zope Changes
 
     Bugs fixed
 
+      - Also look for ZEXP imports within the clienthome directory. This
+        provides a place to put imports that won't be clobbered by buildout
+        in a buildout-based Zope instance.
+
       - LP #143444: add labels to checkboxes / radio buttons on
         import / export form.
 

lib/python/OFS/ObjectManager.py

@@ -642,6 +642,8 @@ class ObjectManager(
         paths = [cfg.zopehome]
         if not cfg.instancehome in paths:
             paths.append(cfg.instancehome)
+        if not cfg.clienthome in paths:
+            paths.append(cfg.clienthome)
         for impath in paths:
             directory = os.path.join(impath, 'import')
             if not os.path.isdir(directory):