- fix segment limit mis-calculation for GCODE_SEL, GDATA_SEL, GPRIV_SEL, LUCODE_SEL and LUDATA_SEL. - move `loader(8) metadata' related printf() after cninit(). - use atop macro (address to pages) for segment limit calculation instead of i386_btop macro (bytes to pages). - fix style bugs for the declarations of ints. Reviewed by: bde, msmith (and arch & audit ML)