note 18185 deleted from ref.shmop by sniper

Note Submitter: andrus@vnet.ee ---- shared memory functions allows you only to write data in shared memory block on creation time, on second opening time you can only read, writing will cause crash (see bugs). there is no way to update data in shared block, only way is to read data, delete shared memory block, create new one, and write changed data back. crash of writing in "a" mode will kill not only script but even apache child will crash with SIGSEGV :\