K 10
svn:author
V 6
marius
K 8
svn:date
V 27
2011-07-26T13:24:52.237712Z
K 7
svn:log
V 504
MFC: r219186

This patch shrinks boot2 a little.

o    It switches kname to be just a pointer instead of an array
     thus avoiding a couple of memcpy()s.

o    It changes ioctl to unsigned from uint8_t.

o    It changes the second keyhit limit to 3 seconds from 5
     so that constant propagation can take place.

o    It changes the ticks overflow computation as suggested by bde@.

o    It removes bi_basemem/bi_extmem/bi_memsizes_valid setting from
     bootinfo as it is unused.

Reviewed by: jhb

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