add missing SVN sources

sources.cfg

 [buildout]
+svn-zope-org = ^
 github = git://github.com/zopefoundation
 
 [sources]
@@ -14,6 +15,7 @@ nt_svcutils = git ${buildout:github}/nt_svcutils
 Persistence = git ${buildout:github}/Persistence
 Products.BTreeFolder2 = git ${buildout:github}/Products.BTreeFolder2
 Products.ExternalMethod = git ${buildout:github}/Products.ExternalMethod
+Products.MailHost = svn ${buildout:svn-zope-org}/Products.MailHost/trunk
 Products.MIMETools = git ${buildout:github}/Products.MIMETools
 Products.OFSP = git ${buildout:github}/Products.OFSP
 Products.PythonScripts = git ${buildout:github}/Products.PythonScripts
@@ -23,4 +25,5 @@ Products.ZCTextIndex = git ${buildout:github}/Products.ZCTextIndex
 Record = git ${buildout:github}/Record
 tempstorage = git ${buildout:github}/tempstorage
 zExceptions = git ${buildout:github}/zExceptions
+zLOG = svn ${buildout:svn-zope-org}/zLOG/trunk
 ZopeUndo = git ${buildout:github}/ZopeUndo