Fix DeprecationWarning about IRegistered/IUnregistered

This would show up as

    /path/to/site-packages/zope/configuration/config.py:240: DeprecationWarning: IRegistered is deprecated. Import from zope.interface.interfaces
      obj = getattr(mod, oname)
    /path/to/site-packages/zope/configuration/config.py:240: DeprecationWarning: IUnregistered is deprecated. Import from zope.interface.interfaces
      obj = getattr(mod, oname)

making it a bit difficult to discover where the source of the warnings
is.

CHANGES.rst

@@ -5,7 +5,9 @@ CHANGES
 4.0.1 (unreleased)
 ------------------
 
-- Nothing changed yet.
+- Fix deprecation warning about importing IRegistered/IUnregistered from
+  their old locations in zope.component.interfaces instead of their current
+  locations in zope.interface.interfaces.
 
 
 4.0.0 (2017-05-25)

setup.py

@@ -78,7 +78,7 @@ def read(*rnames):
         'zope.container >= 4.1.0',
         'zope.i18n >= 4.2.0, < 4.5.0',
         'zope.i18nmessageid >= 4.1.0',
-        'zope.interface',
+        'zope.interface >= 3.8.0',
         'zope.publisher >= 4.3.2',
         'zope.security',
     ],

src/zope/app/i18n/configure.zcml

@@ -35,13 +35,13 @@
 
   <subscriber
       for=".interfaces.ILocalTranslationDomain
-           zope.component.interfaces.IRegistered"
+           zope.interface.interfaces.IRegistered"
       handler=".translationdomain.setDomainOnActivation"
       />
 
   <subscriber
       for=".interfaces.ILocalTranslationDomain
-           zope.component.interfaces.IUnregistered"
+           zope.interface.interfaces.IUnregistered"
       handler=".translationdomain.unsetDomainOnDeactivation"
       />