* init.c: (scm_boot_guile, scm_boot_guile_1): New, simplified

initialization procedure.
- Delete in, out, err arguments; there are other perfectly good
ways to override these when desired.
- Delete result argument; this function shouldn't ever return.
- Rename init_func argument to main_func, for less confusion.
- Delete boot_cmd argument; main_func is more general.
-Add 'closure' argument, to help people pass data to main_func
without resorting to global variables.
- Abort if reentered; don't bother returning an error code.
- Call scm_init_standard_ports to set up the default/current
standard ports; no need to pass them to scm_start_stack.
- Remove code to evaluate the boot_cmd, and start the repl; let
the user do something like that in main_func if they want.
- Remove code to package up a return value; main_func can do any
of that as needed.
- Call exit (0), instead of returning.
(scm_start_stack): Don't initialize the I/O ports here; that's
weird.  Delete in, out, err arguments.  Move guts to
scm_init_standard_ports, scm_stdio_to_port.
(scm_init_standard_ports): New function, to set up current and
default standard ports.
(scm_start_stack, scm_restart_stack): Make these static.
* init.h (scm_boot_guile): Adjust declaration.
(scm_start_stack, scm_restart_stack): Remove externally
visible declarations for these.
(enum scm_boot_status): Removed; now scm_boot_guile never returns.

libguile/init.h

@@ -47,24 +47,10 @@
 #include "libguile/__scm.h"
 
 
-
-enum scm_boot_status
-{
-  scm_boot_ok = 0,
-  scm_boot_error,
-  scm_boot_emem,
-  scm_boot_ereenter
-};
-
-
-
-extern void scm_start_stack SCM_P ((void *base,
-				    FILE *in, FILE *out, FILE *err));
-extern void scm_restart_stack SCM_P ((void * base));
-extern int scm_boot_guile SCM_P ((char **result,
-				  int argc, char **argv,
-				  FILE *in, FILE *out, FILE *err,
-				  void (*init_func) (),
-				  char *boot_cmd));
+extern void scm_boot_guile SCM_P ((int argc, char **argv,
+				   void (*main_func) (void *closure,
+						      int argc,
+						      char **argv),
+				   void *closure));
 
 #endif  /* INITH */