Alter how command lists are interpreted. Might fix some issues.

Details:
* Only trim commands from the left side (both on feed and check).
* Ensure versions with and without leading '/' are fed into trees.
* Move methods to feed CharPrefixTree from configs to CommandUtil.

Potentially fixes (untested):
* Only deny the sub-commands for a prefix, example: feed 'version ' to
consoleonly, in order to allow 'version' but not 'version NoCheatplus'.
* Might fix some plugin/server specific prefixes not being detected,
example: feed "/version" and expect "/bukkit:version" to be blocked.
[BLEEDING] Prevent noclip using commands with untracked moves.

A cheat client could move such that they are inside of a block, but
CraftBukkit will not fire an event, because the distance and looking
direction don't change enough. Teleporting other players or yourself to
that location would result in getting someone into a block. Consequently
 we also have to block commands like /sethome at such locations.

Our first attempt to patch that will monitor teleports that use the
TeleportCause.COMMAND (might miss out on plugins that are not using the
appropriate cause, and on plugins that use items for teleportation), in
addition we monitor certain commands (configurable prefixes), to catch
things like "sethome" and "sethome2". The world spawn is exempted. Only
teleports into blocks are monitored.

This does not yet sanity-check the distance to the last tracked
location, but it will ignore if none is set.