* Get rid of the RCS Header stuff.  They're meaningless in git.
 * Add public domain comment to some of the files if the only comment
   was the RCS header.

On Linux, os_init can re-exec lisp to set up the correct personality.
Not normally a problem, but if any output happens before os_init is
called, the output appears to happen twice.  So add os_init0 to do
this early on, before any output.  This is a bit of a kludge.

lisp/lisp.c:
o Call os_init0 early in main.

lisp/Linux-os.c:
o Move the personality stuff from os_init to os_init0.

lisp/Darwin-os.c:
lisp/FreeBSD-os.c:
lisp/NetBSD-os.c:
lisp/OpenBSD-os.c:
lisp/hpux-os.c:
lisp/irix-os.c:
lisp/mach-os.c:
lisp/osf1-os.c:
lisp/solaris-os.c:
lisp/sunos-os.c:
o Add dummy implementation of os_init0.  These OSes don't (currently)
  need anything special.

lisp/os.h:
o Declare os_init0.

o Follow CMUCL coding style.
o Argv and envp are const char*.

os.h:
lisp.c:
Darwin-os.c:
FreeBSD-os.c:
NetBSD-os.c:
OpenBSD-os.c:
hpux-os.c:
irix-os.c:
mach-os.c:
osf1-os.c:
solaris-os.c:
sunos-os.c:
o argv and envp are const char *.

    When run on a kernel compiled without COMPAT_BRK CMUCL segfaults,
    so I copied the kludge used by SBCL - check the current
    personality, and if necessary, enable ADDR_NO_RANDOMIZE and
    re-exec itself.

Linux-os.c:
o Check for personality and rexec if necessary.

os.h:
o New prototype for os_init needed because it needs argv and envp.

lisp.c:
Darwin-os.c:
FreeBSD-os.c:
NetBSD-os.c:
OpenBSD-os.c:
hpux-os.c:
irix-os.c:
mach-os.c:
osf1-os.c:
solaris-os.c:
sunos-os.c:
o Update call to os_init, which needs argv and envp now.

quoted include with an include of the system signal.h where needed.

reg_NARGS macro on these targets and use SC_REG to replace open-coded
assignments to platform specific sigcontext members in interrupt.c and
os-common.c.  This code could be simplified further by merging the x86
and AMD64 cases into the general case.

.indent.pro.

code which were previously conditionalized on :FreeBSD, are now
conditionalized on :BSD instead, with the :BSD feature now implying a
4.4BSD(lite2) derived OS.  This should make future BSD-ports easier.
FreeBSD and OpenBSD are differentiated by having either :FreeBSD or
:OpenBSD on the features list.

Currently the OpenBSD port does not have working ELF support, because
OpenBSD 2.9 is still non-ELF by default.  So don't put ELF on the
features list when building for OpenBSD, or fix the code to work
correctly in this case instead.

  of the dynamic space. DYNAMIC_SPACE_SIZE now defines the maximum
  size, and when defined DEFAULT_DYNAMIC_SPACE_SIZE gives the default.

o Increase the maximum dynamic space size for Linux x86 to 1.625GB,
  with the default remaining at 512MB.

o Define the default dynamic space size for FreeBSD x86 to also be 512MB,
  with a maximum of 2GB.

table size by 25%, and move to a fixed layout of the page flags to
better support future atomic operations for threaded code.