* 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.

void keyword to specify empty parameter lists.

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

.indent.pro.

sigcontext so it can pass them to arch_get_bad_addr.

memory.

VM_PROT_EXECUTE so that we can execute code on it.

*internal-gc-trigger* for the RT, and allocators explicitly test against
it.

with the header file.