ChangeLog, configure, MCONFIG.in, configure.in:

ChangeLog, configure, MCONFIG.in, configure.in:
  MCONFIG.in: Always include src/include in the include path now.  This
  	forces us to use our internally provided ext2_fs.h file, for sanity's
  	sake.
  configure.in: If linux/fs.h isn't found, then add build/include into
  	the include path only, since src/include is now always included.
  	Removed define of HAVE_LINUX_FS_H, since we're not using it any more.
  	Removed i_version vs. i_generation check, since with the included
  	header file it is a permanently known quantity.  Removed AC_C_CROSS
  	since it has been merged into AC_PROG_CC in autoconf 2.13.