Keep the colleague's microbu-esp32c5 tree in this repository

obu-firmware builds against vanetza-idf from microbu-esp32c5/external, but
that tree was gitignored, so a clone of this repository could not build the
firmware it ships. It is now committed here as ordinary files in its own
folder, microbu-esp32c5/: the colleague's commit cf4b99f plus the V2X2MAP
bridge's signature verification (--trust) used on the bench. Nothing is
fetched from or pushed to the colleague's repository; this repository and
its remotes carry everything. The folder's own .gitignore keeps build output,
downloaded components and private key material out, as it did there; the
committed file set is identical to that repository's tracked files.

The ESP32-C5 is still flashed from obu-firmware/, which only takes
vanetza-idf from microbu-esp32c5/, so the two stay separate folders.
FLASHING.md says how to take a newer version of the colleague's tree (copy
it over the folder, rebuild, test, commit).

microbu-esp32c5/external/vanetza-idf/vanetza/asn1/support/ENUMERATED.h

@@ -0,0 +1,67 @@
+/*-
+ * Copyright (c) 2003-2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+#ifndef	_ENUMERATED_H_
+#define	_ENUMERATED_H_
+
+#include "INTEGER.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef INTEGER_t ENUMERATED_t;		/* Implemented via INTEGER */
+
+extern asn_TYPE_descriptor_t asn_DEF_ENUMERATED;
+extern asn_TYPE_operation_t asn_OP_ENUMERATED;
+
+#define ENUMERATED_free ASN__PRIMITIVE_TYPE_free
+
+#if !defined(ASN_DISABLE_PRINT_SUPPORT)
+#define ENUMERATED_print INTEGER_print
+#endif  /* !defined(ASN_DISABLE_PRINT_SUPPORT) */
+
+#define ENUMERATED_compare INTEGER_compare
+#define ENUMERATED_copy    INTEGER_copy
+
+#define ENUMERATED_constraint asn_generic_no_constraint
+
+#if !defined(ASN_DISABLE_BER_SUPPORT)
+#define ENUMERATED_decode_ber ber_decode_primitive
+#define ENUMERATED_encode_der INTEGER_encode_der
+#endif  /* !defined(ASN_DISABLE_BER_SUPPORT) */
+
+#if !defined(ASN_DISABLE_XER_SUPPORT)
+#define ENUMERATED_decode_xer INTEGER_decode_xer
+#define ENUMERATED_encode_xer INTEGER_encode_xer
+#endif  /* !defined(ASN_DISABLE_XER_SUPPORT) */
+
+#if !defined(ASN_DISABLE_JER_SUPPORT)
+jer_type_decoder_f ENUMERATED_decode_jer;
+#define ENUMERATED_encode_jer INTEGER_encode_jer
+#endif  /* !defined(ASN_DISABLE_JER_SUPPORT) */
+
+#if !defined(ASN_DISABLE_OER_SUPPORT)
+oer_type_decoder_f ENUMERATED_decode_oer;
+oer_type_encoder_f ENUMERATED_encode_oer;
+#endif  /* !defined(ASN_DISABLE_OER_SUPPORT) */
+
+#if !defined(ASN_DISABLE_UPER_SUPPORT)
+per_type_decoder_f ENUMERATED_decode_uper;
+per_type_encoder_f ENUMERATED_encode_uper;
+#endif  /* !defined(ASN_DISABLE_UPER_SUPPORT) */
+#if !defined(ASN_DISABLE_APER_SUPPORT)
+per_type_decoder_f ENUMERATED_decode_aper;
+per_type_encoder_f ENUMERATED_encode_aper;
+#endif  /* !defined(ASN_DISABLE_APER_SUPPORT) */
+
+#if !defined(ASN_DISABLE_RFILL_SUPPORT)
+#define ENUMERATED_random_fill INTEGER_random_fill
+#endif  /* !defined(ASN_DISABLE_RFILL_SUPPORT) */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* _ENUMERATED_H_ */