oxcfold: Fix stupid crash EcDoRpc_RopGetContentsTable

And this time, implement handle clean up properly

This reverts also a28d0add2698cbd4beb13f518e11aad2478317f7
mapistore/oxio: Clean up imports
End URL with '/' for the moment to cope with existing sogo-specific model
- Remove useless memory allocation for clist
- Add PyString_Check on dict items expected to be strings
mapistore/python: Add new line to an error message
mapistore/sample.py: Fix indentation in Folder.delete()
mapistore/oxio.py: polish log messages and remove obsolete comments
mapistore/oxio.py: Implement get properties for Folder
mapistore/oxio.py: Make more sane properties for subfolders while listing in Hierarchy table
mapistore/python: *_python_get_properties() should allocate in supplied mem_cx

Fix smb_panic() - data parameter may be just a local variable to be
filled in (as it is in the case), but mem_ctx is always the context
we should allocate memory in
Update sample uri to end up with '/'
Update sample fid/mid from uint32_t to uint64_t to include valid replica ID
Hardcode some references to test sample:// backend easily
Fix the list contexts loop
Add PyBool/boolean support to python mapistore property mapping
Add PidTagSubfolders and set it to False for child folder of sample backend
mapistore/oxio.py: Just print proreties in Table.set_columns() w/o any mapping
mapistore/oxio.py: Fake Folder.set_properties() to make Outlook happy
Add required set of properties to the message so that it can be displayed in Outlook 2010
Move the message underneath deadbeef rather than dead1001
Add cache in dictionary when creating new folder
Add support for PT_I8
mapistore/oxio: Implement Indexing using Opechange MySQL database

Hence, _Index class completely refactored into now _Indexing
 * use MySQL mapistore_indexing for Get/Add new URLs
 * use mapistore_indexes to allocate new Index number
   + a conversion into Exchange FMID
 * transparent conertions between Index format for URIs and
   OXIO format of URI

todo:
 * Username should be propagated to the index
 * may be reractor this code as a thin wrapper on top of future
   python bindings for Indexing service