K 10
svn:author
V 3
avg
K 8
svn:date
V 27
2011-12-17T15:16:54.622612Z
K 7
svn:log
V 456
introduce cngets, a method for kernel to read a string from console

This is intended as a replacement for libkern's gets and mostly borrows
its implementation.  It uses cngrab/cnungrab to delimit kernel's access
to console input.

Note: libkern's gets obviously doesn't share any bits of implementation
iwth libc's gets.  They also have different APIs and the former doesn't
have the overflow problems of the latter.

Inspired by:	bde
MFC after:	2 months

END