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

ldapclient.c

@@ -4,7 +4,6 @@
 #include <string.h>
 #include "byte.h"
 #include "buffer.h"
-#include "asn1.h"
 #include "ldap.h"
 #include "socket.h"
 #include "ip4.h"
@@ -51,7 +50,7 @@ static int ldapbind(int sock) {
 }
 
 int main(int argc,char* argv[]) {
-  int sock;
+  int sock=0;
   char buf[BUFSIZE];
   int len=0;
   char* me;