add "generic" format string based encoder and decoder (scan_asn1generic,

fmt_asn1generic, see t10.c for example usage)
add "generic" asn.1 dumper (in t10.c)
fix some read off-by-one errors, minor cleanups
add real OID support
add bitstring support

dumpacls.c

@@ -15,7 +15,7 @@ int main(int argc,char* argv[]) {
   if (!map) {
     buffer_puts(buffer_2,"could not open `");
     buffer_puts(buffer_2,fn);
-    buffer_puts(buffer_2,"´: ");
+    buffer_puts(buffer_2,"': ");
     buffer_puterror(buffer_2);
     buffer_putnlflush(buffer_2);
     exit(1);