Make the size of all spaces configurable from the command line.

code/commandline.lisp:
o Define the switches so lisp doesn't complain.

general-info/lisp.1:
o Document new switches.

general-info/release-20c.txt:
o Update

lisp/Darwin-os.c
lisp/FreeBSD-os.c
lisp/Linux-os.c
lisp/NetBSD-os.c
lisp/backtrace.c
lisp/cgc.c
lisp/gencgc.c
lisp/os-common.c
lisp/ppc-validate.h
lisp/purify.c
lisp/solaris-os.c
lisp/sparc-arch.c
lisp/sparc-validate.h
lisp/x86-validate.h:
lisp/validate.c
o Basically rename CONTROL_STACK_SIZE, BINDING_STACK_SIZE,
  READ_ONLY_SPACE_SIZE, and STATIC_SPACE_SIZE to control_stack_size,
  binding_stack_size, read_only_space_size, and static_space_size,
  respectively.

lisp/coreparse.c
o Check the space size in the core file against the allocated size.
  If the allocated space is too small, print an error message and
  exit.

lisp/globals.c
o Define new variables for the allocated size of spaces.

lisp/globals.h
o Declare the new variables for the size of the spaces.

lisp/lisp.c
o Set the default values of the spaces.
o Parse the new command-line flags and set the space sizes.

lisp/sunos-os.c:
o Added os_init0 (that we forgot last time).

lisp/x86-assem.S:
o Change $CONTROL_STACK_END to GNAME(control_stack_end) to get the
  correct end of the stack.

Bug was pointed by Christophe in private email.  Fix is based on his
suggested solution.  Some examples that should work now:

(round 100000000002.9d0) -> 100000000003

(round (+ most-positive-fixnum 1.5w0)) -> 536870912

stack overflows would crash lisp.

Darwin-os.c:
o Need to check for stack overflow in the sigbus handler.  (Without
  that, it's treated as a regular bus error.)
o Add the rest of the infrastructure to handle the stack overflow.

release-20c.txt:
o Update

general-info/release-20c.txt
o Update to asdf2 2.017.

Patch from Helmut Eller, cmucl-imp 2011-06-11.

Patch from Helmut Eller, cmucl-imp 2011-08-11.

o Add note about build-all.sh.

o Unicode updated to version 6.0.0.
o Trac #43 repoened because that change was reverted.

o Update the version number for ASDF.

This makes it easy to make an executable image that doesn't need
unidata.bin around.  (Should we do this for normal cores?  It seems to
add about 1 MB to the core size.)

code/unidata.lisp:
o Add LOAD-ALL-UNICODE-DATA to load all unicode data.
o Add UNICODE-DATA-LOADED-P to check that unicode data has been
  loaded.

code/print.lisp:
o If unicode data is loaded, don't check for existence of
  *unidata-path*, because we don't need it.

code/exports.lisp:
o Export LOAD-ALL-UNICODE-DATA.

general-info/release-20c.txt:
o Update info

Also, Solaris/x86 supports both sse2 and x87 now.

(OPEN PN :DIRECTION :IO :IF-DOES-NOT-EXIST NIL)

no longer signals an error.

code/fd-stream.lisp:
o Don't try to create a new version if there's no existing file

general-info/release-20c.txt:
o Update.

This fixes ansi-test COMPILE-FILE.14.

compiler/fndb.lisp:
o Tell compiler that :OUTPUT-FILE can also be a stream.

general-info/release-20c.txt:
o Update.

the start.  This was due to one of two things:  The result sequence
was created with a negative length, creating invalid objects, or
accessing the invalid object would cause a segfault.

code/seq.lisp:
o Declare the type of LENGTH in MAKE-SEQUENCE-OF-TYPE better.  It's
  not a fixnum, but an index (non-negative fixnum).  This should catch
  any mistakes where we try to create sequences of negative length.
o Explicitly catch invalid START and END indices in VECTOR-SUBSEQ* and
  LIST-SUBSEQ* and signal an error

general-info/release-20c.txt:
o Document bugfix.

only happens in some situations.

should be handled.

compiler/main.lisp:
o Add DECODING-ERROR slot to SOURCE-INFO structure.
o MAKE-FILE-SOURCE-INFO requires a decoding error argument so the
  SOURCE-INFO structure can be properly initialized.
o Add :DECODING-ERROR keyword arg to COMPILE-FILE to specify how
  decoding errors are handled.  Default is T, which means to signal an
  error.

compiler/fndb.lisp:
o Tell compiler about the new parameter.

general-info/release-20c.txt:
o Document change.

o Bug fix for pairwise composition table.