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FLASHING.md says how to take a newer version of the colleague's tree (copy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/ANY.h

@@ -0,0 +1,87 @@
+/*-
+ * Copyright (c) 2004-2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+#ifndef ASN_TYPE_ANY_H
+#define ASN_TYPE_ANY_H
+
+#include "OCTET_STRING.h"	/* Implemented via OCTET STRING type */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct ANY {
+	uint8_t *buf;	/* BER-encoded ANY contents */
+	int size;	/* Size of the above buffer */
+
+	asn_struct_ctx_t _asn_ctx;	/* Parsing across buffer boundaries */
+} ANY_t;
+
+extern asn_TYPE_descriptor_t asn_DEF_ANY;
+extern asn_TYPE_operation_t asn_OP_ANY;
+extern asn_OCTET_STRING_specifics_t asn_SPC_ANY_specs;
+
+#define ANY_free OCTET_STRING_free
+
+#if !defined(ASN_DISABLE_PRINT_SUPPORT)
+#define ANY_print OCTET_STRING_print
+#endif  /* !defined(ASN_DISABLE_PRINT_SUPPORT) */
+
+#define ANY_compare OCTET_STRING_compare
+#define ANY_copy    OCTET_STRING_copy
+
+#define ANY_constraint asn_generic_no_constraint
+
+#if !defined(ASN_DISABLE_BER_SUPPORT)
+#define ANY_decode_ber OCTET_STRING_decode_ber
+#define ANY_encode_der OCTET_STRING_encode_der
+#endif  /* !defined(ASN_DISABLE_BER_SUPPORT) */
+
+#if !defined(ASN_DISABLE_XER_SUPPORT)
+#define ANY_decode_xer OCTET_STRING_decode_xer_hex
+xer_type_encoder_f ANY_encode_xer;
+#endif  /* !defined(ASN_DISABLE_XER_SUPPORT) */
+
+#if !defined(ASN_DISABLE_JER_SUPPORT)
+jer_type_decoder_f ANY_decode_jer;
+jer_type_encoder_f ANY_encode_jer;
+#endif  /* !defined(ASN_DISABLE_JER_SUPPORT) */
+
+#if !defined(ASN_DISABLE_UPER_SUPPORT)
+per_type_decoder_f ANY_decode_uper;
+per_type_encoder_f ANY_encode_uper;
+#endif  /* !defined(ASN_DISABLE_UPER_SUPPORT) */
+#if !defined(ASN_DISABLE_APER_SUPPORT)
+per_type_decoder_f ANY_decode_aper;
+per_type_encoder_f ANY_encode_aper;
+#endif  /* !defined(ASN_DISABLE_APER_SUPPORT) */
+
+/******************************
+ * Handy conversion routines. *
+ ******************************/
+
+/* Convert another ASN.1 type into the ANY. This implies DER encoding. */
+int ANY_fromType(ANY_t *, asn_TYPE_descriptor_t *td, void *struct_ptr);
+ANY_t *ANY_new_fromType(asn_TYPE_descriptor_t *td, void *struct_ptr);
+#if !defined(ASN_DISABLE_APER_SUPPORT)
+int ANY_fromType_aper(ANY_t *st, asn_TYPE_descriptor_t *td, void *sptr);
+ANY_t *ANY_new_fromType_aper(asn_TYPE_descriptor_t *td, void *sptr);
+#endif  /* !defined(ASN_DISABLE_APER_SUPPORT) */
+
+/* Convert the contents of the ANY type into the specified type. */
+int ANY_to_type(ANY_t *, asn_TYPE_descriptor_t *td, void **struct_ptr);
+#if !defined(ASN_DISABLE_APER_SUPPORT)
+int ANY_to_type_aper(ANY_t *, asn_TYPE_descriptor_t *td, void **struct_ptr);
+int ANY_to_type_aper_checked(ANY_t *, asn_TYPE_descriptor_t *td, void **struct_ptr);
+#endif  /* !defined(ASN_DISABLE_APER_SUPPORT) */
+
+#define	ANY_fromBuf(s, buf, size)	OCTET_STRING_fromBuf((s), (buf), (size))
+#define	ANY_new_fromBuf(buf, size)	OCTET_STRING_new_fromBuf(	\
+						&asn_DEF_ANY, (buf), (size))
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* ASN_TYPE_ANY_H */