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

scan_ldapmodifyrequest.c

@@ -1,5 +1,4 @@
 #include <stdlib.h>
-#include "asn1.h"
 #include "ldap.h"
 
 #if 0