jail extensions

[Alex Lyashkov]

> 2) at MOD_LOAD case run loop for each prisons and init private data for
> this module at all contexts. At this way module always 'exist' at all
> contexts.
> and disable module compiling (loading) when module don`t marked jail
> safe.
example for this way.
http://cvs.freevps.com/index.cgi/kernel/include/linux/freevps/s_context_xfrm.h?rev=1.3
http://cvs.freevps.com/index.cgi/kernel/net/ipv4/ah4.c?rev=1.3
ah4_init/ah4_fini functions.

-- 
Alex Lyashkov <shadow at psoft.net>