* Remove PAGE_MADVISE_MASK
 * Remove code using PAGE_MADVISE_MASK
 * Move some #defines from gencgc.c to gencgc.h
 * Add new or better comments

This should only be temporary so we can get some testing with lazy
mode.

 * Disable gencgc_debug_madvise.

 * Add MODE_LAZY
 * Rename PAGE_MADVISE flag to PAGE_MADVISE_MASK
 * Remove some #ifdef'ed out code.
 * Change default gencgc_unmap_zero to MODE_MEMSET for all OS/archs.

   madvise, though.  I get an error about no transport function for
   some object.

 * Actually enable call to madvise instead of doing memset.

out freed pages.

 bin/build-utils.sh::
 * asdf is not part of build-utils.sh

 bin/build.sh::
 * Build asdf as part of the normal build because it's always part of
   the main tarball, not the extras tarball.

 * Increase the size of *powers-of-ten* a bit.
 * In expt-ten, handle the case where the exponent exceeds the size of
   the *powers-of-ten* array.

 * Initialize in-length to in-buffer-length, not 0.
 * Added a few more debugging prints.

release.  Some Debian versions have a release name like "3.7-trunk",
which is missing the patch version.

Missed one place in DO-UNARY-BYTE-BASH to adjust the call to END-MASK
to use a bit offset instead of a byte offset.  This affects anything
that was using DO-UNARY-BYTE-BASH, including REPLACE.

count needs to be incremented one to adjust for the UTF-16 encoding of
strings that we use.

Still needs work because the word-break tests fail.

When accounting for the octets left in the in-buffer that we haven't
read (or converted to characters), we were subtracting the index from
the total in-buffer length.  This is wrong if the file is less than
the total in-buffer length.  We should have subtracted from the actual
number of octets in the in-buffer.

changed.

* Rename the slot to %READTABLE-CASE (from READTABLE-CASE).
* Add READTABLE-CASE and (SETF READTABLE-CASE) functions, as required.
* Check for the standard readtable in (SETF READTABLE-CASE).

error.lisp::
* Create two new conditions, one for modifying the readtable and one
  for the pprint dispatch table.

exports.lisp::
* Export the two new conditions.

pprint.lisp::
* Add check to SET-PPRINT-DISPATCH to disallow modifying the standard
  pprint dispatch table.
* Allow PPRINT-INIT to modify the standard pprint dispatch table.

print.lisp::
* In WITH-STANDARD-IO-SYNTAX, don't copy a new dispatch table; bind
  *print-pprint-dispatch* to the standard table.

reader.lisp::
* Add check to disallow modifying the standard readtable.
* Allow INIT-STD-LISP-READTABLE to modify the standard readtable.