sys/limits.h shouldn't be in the exception_lists anymore.
Move zfd(7D) out of brand/lx and into system/zones, plus some brand/lx header
file removals.

*** 983,987 ****
--- 983,994 ----
  
  #
  # debugging program for libadutils
  #
  usr/bin/test-getdc
+ 
+ #
+ # LX Brand internals
+ #
+ 
+ usr/include/sys/inotify.h
+ usr/include/sys/zfd.h