Make syslogd.c, init.c, and update.c compile error/warning free under both libc5 and libc6.

-Erik

update.c

@@ -28,12 +28,14 @@
 #include <sys/param.h>
 #include <sys/syslog.h>
 
+
 #if defined(__GLIBC__)
 #include <sys/kdaemon.h>
 #else
-_syscall2(int, bdflush, int, func, int, data);
+static _syscall2(int, bdflush, int, func, int, data);
 #endif							/* __GLIBC__ */
 
+
 static char update_usage[] =
 	"update [options]\n"
 #ifndef BB_FEATURE_TRIVIAL_HELP
@@ -109,7 +111,7 @@ extern int update_main(int argc, char **argv)
 			}
 		}
 	}
-	exit( TRUE);
+	return( TRUE);
 }
 
 /*