Virtual Console init

vcinit is now licensed under the GPLv2 only, and
not necessarily any later version of the GPL.

Many changes were made.

The only user visible change is that the number of
default active Virtual Consoles is now 9, not 5.
Signal handling was improved to fix an unlikely
race condition made possible by the use of
non-reentrant functions in a couple of handlers.
The set of ignored signals in VCinit children was
also fixed.

A cosmetic bug has been fixed, along with some typos in the documentation. There is no need to upgrade if you're running version 1.0 (unless the cosmetic bug annoys you).