[NTOSKRNL]

[NTOSKRNL]
- Do not repeat messages into serial port even when using other debug methods.
- Allow to specify debug log file name.
- When using the "Screen" method, show blue screen when entering KDB.
- Disable the repetition of previous KDB command with long many-page output.

[USETUP]
- Add "ReactOS (Screen)" entry to boot menu.

svn path=/trunk/; revision=54468