Code review comments from pmooney (sundry), and igork (screwups in zonecfg refactoring)

*** 313,324 ****
                           * Don't allow ASLR to cause mappings to fail below
                           * because of SF erratum #57
                           */
                          maxslew = MIN(maxslew, (addr - errata57_limit));
  
!                         slew = slew % MIN(MIN(aslr_max_map_skew, (addr - base)),
!                             addr - errata57_limit);
                          addr -= P2ALIGN(slew, align_amount);
                  }
  
                  ASSERT(addr > base);
                  ASSERT(addr + len < base + slen);
--- 313,323 ----
                           * Don't allow ASLR to cause mappings to fail below
                           * because of SF erratum #57
                           */
                          maxslew = MIN(maxslew, (addr - errata57_limit));
  
!                         slew = slew % maxslew;
                          addr -= P2ALIGN(slew, align_amount);
                  }
  
                  ASSERT(addr > base);
                  ASSERT(addr + len < base + slen);