IP/player inference for /ipban and /uban

With this release, /ipban and /uban will no longer require the player or ip tags. Instead, they will infer whether the provided target is a player or an IP. If it resembles an IP but a player exists whose username is that IP, the sender will be prompted to retype the command and append either the player or ip flag, depending on which they want to ban. If both the player and ip flags are set, the command will ignore both, as this does not remove any ambiguity. The new usage for /ipban is /ipban <target> [reason] [-duration|-d <duration>] [-player|-p] [-ip]. That of /uban is similar, but without the duration flag.