* Fix material loading from config requiring minecraft: namespace.
* Fix disallowed-lightning blocks. Lightning entities are weird.
* Fix /wg reload overwriting config changes.
* General around thread usage/naming/shutdown. If anyone was actually
making their own managers/indices you deserve to break.
Note that due to deficiencies in the Bukkit API, the event will attempt
to be overprotective and cancel some events that may not actually result
in the player equipping an item. Maintainable PRs welcome. (i.e. would
rather not have to have a list of slot numbers for various inventories
and match them to items :upside_down:)
Helper suffers from race conditions for short-lived tasks, leading to
some poor UX conditions such as errors not propagating to the user
(because the exception handler wasn't attached to the future yet), or
lack of success messages.
This commit replaces that system by a Builder which takes a callable to
begin, and then takes supervisor, delay message, and the success and
failure messages and handlers as parts of the builder. The success and
failure handlers wrap the callable itself before submitting to the
executor so they will always be run. The supervisor and delay are added
as listeners to the future since they aren't required if the task is
sufficiently short-lived (and to maintain compatibility with the classes
which are now in WorldEdit).
The builder also supports Components for success and failure messages,
as well as consumers of the callable's result or exception for better
customization of output, instead of having to rely on adding a callback
to the future.
The future is still returned for certain special usages.
Fixes a few issues such as /wg stopprofile leaving a pseudo-cancelled
task in the supervisor, delaying server shutdowns until profiles finish,
not forwarding exceptions that occur during tasks running correctly, etc.
Frosted-ice-form is checked with build, meaning it can be set to allow
for non-members to use frost walker, deny for members to not be able to
use frost walker, or none to respect membership.
Reverts behavior of ice-melt flag to pre-7.x behavior.
Apparently this wasn't covered before.
Fixes WORLDGUARD-4077.
Closes#364.
