The unmodifiable collection in the original code is not immutable: when
the original collection is modified, this is reflected (which can cause
problems in iterators created from the unmodifiable collection). This
commit creates a new collection to prevent this from happening.

REST API Plugin update to version 1.2.2

A fix for OF-1041

Should not store chat state messages, which contain a thread element.

OF-1037: Split Bookmarks from ClientControl.

The problem was, that the logic stored empty chat messages, which contained a thread and chat state. The loop first checked the namespace of the thread, which was empty and therefore thought it should store it.

Made a search by distinguishedName Active Directory specific
as it is difficult to come up with a generic solution.

OF-1042: Don't NPE when a session is already closed when </stream>

Update plugin min Openfire version requirement to 4.0.0

Fixes for banning problems in MUC rooms

After banning, the user is not kicked from the room. The user is added
to the ban list so they can't re-join the room or post messages, but
they are not kicked out of the room so the user can still receive messages
sent to the room.

The problem is an additional check for isMembersOnly() was only allowing users
to be kicked from members only chat rooms. Whenever a user is marked as an
outcast they should be kicked from the room regardless of if the room is a
members only room or not.

Looks like this problem was introduced in commit
822abb01

Based on the MUC spec it should be sending "outcast" on banning.

Looks like this was introduced in commit 822abb01

Previously, we had a quasi-hack of `3.11.0-alpha` as the min requirement
on these, but this release never happened.  This update moves all these
plugins to 4.0.0, which hopefully provokes less confusion.

Denote Openfire 4.0.0 Release

OF-454 Reflect presence to originator

Only use SSLv2Hello for client-mode

OF-1004: Apply i18n to admin console

Fix some javadoc warnings

OF-821: Count occupants by nickname

OF-1034 Check for existing sessions properly

Returns the count of nicknames rather than the number of connections
(full JIDs), which will now also match the list of occupants.

solve the memory leak problems which is caused by add LocalMUCRoom ob…

OF-821: Prevent duplicates for MUC item query

Drop unnecessary null check.

Corrects issue with multiple JIDs sharing a nickname (masquerading)

Replaced the 'set this var with this translation' definition for
a functional equivalent but easier-on-the-eyes definition.