This is an integer value
Add HTML5 sandboxing to IFRAME used to display message HTML data
[mms] Fix race condition where memcache lock could be removed before the underlying locked data could be updated.

Namely, this affected session handling. Registering a shutdown function
is necessary to remove locks that would never be unlocked in
sessionhandler destruct code due to PHP fatal errors. This could should
be a failsafe however - we should NOT be unlocking otherwise since that
is the responsibility of the calling/locking code.

This was resulting in session locks being cleared at some point during
shutdown function processing, leaving a small gap between this event and
when the session was ultimately written/closed, where a competing
session access could read the session before it was written.
Released Horde_Memcache-2.0.7
Development mode for Horde_Memcache-2.0.8