Hi devs,
 I need to fix, and I have a proposed commit at
https://github.com/dgervalle/xwiki-platform/commit/068c24793dd77daa826765e3…
 Basically, it does the following:
   a) Add XWikiDocument#getKey() which return a unique text key like
 8:fullname2:fr
   b) Add XWikiDocument#getKey(context) which return a unique text key like
 5:xwiki8:fullname2:fr
   c) Change XWikiDocument#getId() to use the lowest 64bits of an MD5 hash
 of XWikiDocument#getKey()
   d) Deprecate all XWikiCacheStore#getKey(...) and
 use XWikiDocument#getKey(context) for the XWikiCacheStore map
   e) Introduce a data migration to convert existing database, also fixing
 links, rcs, attachements and deleted attachements use of docid.
 I am +1 only after XWIKI-7006 is fixed (see my previous vote), since any
 improper access to an outdated database would corrupt it.
 Currently the patch is ready for 3.3, but if XWIKI-7006 goes in 3.2, I am
 also +1 to have this in 3.2.