Add fsctl command to summon reincarnation

If you start freeswitch with -reincarnate or -reincarnate-reexec, FS
will restart automatically in the event of an unexpected exit.

Currently, you can cause FS to immediately call exit(0) with `fsctl
shutdown now`, or you can have it call abort() with `fsctl crash`.
Which are both nice, but if you have reincarnation engaged, you really
might want FS to call exit([non-zero]) so the great supervisor
immediately breathes life back into your system.

This is now available via `fsctl shutdown reincarnate now`.

src/include/switch_types.h

@@ -1994,6 +1994,7 @@ typedef enum {
 	SCSC_DEBUG_LEVEL,
 	SCSC_FLUSH_DB_HANDLES,
 	SCSC_SHUTDOWN_NOW,
+	SCSC_REINCARNATE_NOW,
 	SCSC_CALIBRATE_CLOCK,
 	SCSC_SAVE_HISTORY,
 	SCSC_CRASH,

src/mod/applications/mod_commands/mod_commands.c

@@ -2268,6 +2268,10 @@ SWITCH_STANDARD_API(ctl_function)
 						command = SCSC_SHUTDOWN_NOW;
 					} else if (!strcasecmp(argv[x], "asap")) {
 						command = SCSC_SHUTDOWN_ASAP;
+					} else if (!strcasecmp(argv[x], "reincarnate")
+							   && (x+1 < argc) && argv[x+1] && !strcasecmp(argv[x+1], "now")) {
+						++x;
+						command = SCSC_REINCARNATE_NOW;
 					} else if (!strcasecmp(argv[x], "restart")) {
 						arg = 1;
 					}
@@ -6746,6 +6750,7 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_commands_load)
 	switch_console_set_complete("add fsctl shutdown cancel");
 	switch_console_set_complete("add fsctl shutdown elegant");
 	switch_console_set_complete("add fsctl shutdown elegant restart");
+	switch_console_set_complete("add fsctl shutdown reincarnate now");
 	switch_console_set_complete("add fsctl shutdown restart");
 	switch_console_set_complete("add fsctl shutdown restart asap");
 	switch_console_set_complete("add fsctl shutdown restart elegant");

src/switch_core.c

@@ -2421,6 +2421,10 @@ SWITCH_DECLARE(int32_t) switch_core_session_ctl(switch_session_ctl_t cmd, void *
 		switch_console_save_history();
 		exit(0);
 		break;
+	case SCSC_REINCARNATE_NOW:
+		switch_console_save_history();
+		exit(SWITCH_STATUS_RESTART);
+		break;
 	case SCSC_SHUTDOWN_ELEGANT:
 	case SCSC_SHUTDOWN_ASAP:
 		{