Fix Handle leaks, incorrect translations being used, and two things.

[KyleSanderson]

Besides the leaks and translations, the other two are just things. You're totally welcome to cherry pick commits, I don't mind. It looks like there's a lot more things that can be done, I can continue onwards if it's wanted.

There's one gotcha, this requires SM1.5 due to the param change with GetClientAuthString (which would just be garbage otherwise).

[peace-maker]

Why would you disable steamid validation in the first place? I'd think especially concerning banning, one should make sure to have the correct id.

[KyleSanderson]

The goal wasn't to change any actual logic, rather fix bugs. I could change the logic, add a translation string (if one doesn't already exist), and return failure if the client isn't authorized. However, I wasn't sure how it would be received, which is why I tried to only do minimal changes.

As it stands, sAuth is garbage (the target name) if GetClientAuthString returns false, which doesn't seem too great as there doesn't appear to be any sort of logic checking for valid input anywhere. I'd like to fix this, but it's quite the task, and I don't know how it would be received.

[ErikMinekus]

The sm_addban command is just plain wrong, it doesn't need to check if the client is in-game, that's what sm_ban is for. I'll rewrite it like http://hg.alliedmods.net/sourcemod-central/file/tip/plugins/basebans.sp#l204. But thanks, more help is always appreciated!