[NTOS:LPC]: Improve the lisibility of some functions:

[NTOS:LPC]: Improve the lisibility of some functions:
- Group together the local parameters used for capturing user variables;
- Add some space between the list of parameters and the beginning of the code proper;
- Rename some variables or move some code to make some different functions look more similar (helps in finding functionality-similar functions in the code);
- Improve some comments;
- Whitespace fixes;
- Few code formatting.
- Use a ExFreePoolWithTag instead of ExFreePool, but otherwise no other functional code changes.

svn path=/trunk/; revision=73162