[PATCH] config: update usage/help info

Replace outdated help message with a reference to README.  Update README
for make *config variants and environment variable info.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

scripts/kconfig/conf.c

@@ -5,6 +5,7 @@
 
 #include <ctype.h>
 #include <stdlib.h>
+#include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 #include <time.h>
@@ -531,7 +532,7 @@ int main(int ac, char **av)
 			break;
 		case 'h':
 		case '?':
-			printf("%s [-o|-s] config\n", av[0]);
+			fprintf(stderr, "See README for usage info\n");
 			exit(0);
 		}
 	}