[AUDIT] security.c is mostly composed of trivial implementations of APIs that transfe...

[AUDIT] security.c is mostly composed of trivial implementations of APIs that transfer one set of data from another, or simply wrap around complex Se* functions which do the actual work. There are one or two slightly more complex APIs (~15-20 lines), but they were written by Eric/Thomas, which are well-known for always writing clean code.
[FORMATTING] Re-formatted file properly, ordered functions and annotated them, added proper programmer credits, etc.
- Pushlocks need to be acquired in a -critical-, not -guarded- region.
- PsDisableImpersonation should return FALSE if it was already disbled.
- Don't forget to reference the token in PsReferenceEffectiveToken.
- PsImpersonateClient should still return success if it was given no token.
- PsImperstonateClient should de-reference the token if there is already active impersonation info.

svn path=/trunk/; revision=23152