symbol collision when building PHP with IMAP and MySQL (Bug #13859).
The bug was originally fixed by MySQL in a more obtrusive way, by
replacing all occurrences of hash_create with hash0_create.  This
change was applied to the MySQL tree as follows:

ChangeSet@1.1616.2924.6, 2007-01-11 12:31:52+01:00, kent@mysql.com +9 -0
  Many files:
    Reverted change for bug#13859, applied smaller patch from Marko