Keep vanetza-idf in obu-firmware, so a plain clone builds the firmware

obu-firmware builds against the vanetza-idf C-ITS library, which until now
came from the colleague's microbu-esp32c5 tree beside the repository and was
not tracked here, so a clone of this repository could not build the firmware
it ships. The library alone is now part of obu-firmware, as
obu-firmware/external/vanetza-idf: their external/vanetza-idf at commit
cf4b99f, unchanged (9775 files; see its PROVENANCE.md). CMake takes it from
there by default; -DVANETZA_IDF_DIR still points the build elsewhere.

The rest of the colleague's tree (their own VAM firmware, PKI tooling,
station-link Python tools, the V2X2MAP bridge) stays out of this repository
and gitignored; nothing is pushed to their repository. NOTES.md, docs/06,
TODO.md and the pcap verifier's usage line point at the new location.

obu-firmware/external/vanetza-idf/vanetza/asn1/support/constr_SET.h

@@ -0,0 +1,115 @@
+/*-
+ * Copyright (c) 2003-2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+#ifndef	_CONSTR_SET_H_
+#define	_CONSTR_SET_H_
+
+#include "asn_application.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+typedef struct asn_SET_specifics_s {
+	/*
+	 * Target structure description.
+	 */
+	unsigned struct_size;       /* Size of the target structure. */
+	unsigned ctx_offset;        /* Offset of the asn_struct_ctx_t member */
+	unsigned pres_offset;       /* Offset of _presence_map member */
+
+	/*
+	 * Tags to members mapping table (sorted).
+	 * Sometimes suitable for DER encoding (untagged CHOICE is present);
+	 * if so, tag2el_count will be greater than td->elements_count.
+	 */
+	const asn_TYPE_tag2member_t *tag2el;
+	unsigned tag2el_count;
+
+	/*
+	 * Tags to members mapping table, second edition.
+	 * Suitable for CANONICAL-XER encoding.
+	 */
+	const asn_TYPE_tag2member_t *tag2el_cxer;
+	unsigned tag2el_cxer_count;
+
+	/*
+	 * Extensions-related stuff.
+	 */
+	int extensible;                             /* Whether SET is extensible */
+	const unsigned int *_mandatory_elements;    /* Bitmask of mandatory ones */
+} asn_SET_specifics_t;
+
+/*
+ * A set specialized functions dealing with the SET type.
+ */
+asn_struct_free_f SET_free;
+
+#if !defined(ASN_DISABLE_PRINT_SUPPORT)
+asn_struct_print_f SET_print;
+#endif  /* !defined(ASN_DISABLE_PRINT_SUPPORT) */
+
+asn_struct_compare_f SET_compare;
+asn_struct_copy_f    SET_copy;
+
+asn_constr_check_f SET_constraint;
+
+#if !defined(ASN_DISABLE_BER_SUPPORT)
+ber_type_decoder_f SET_decode_ber;
+der_type_encoder_f SET_encode_der;
+#endif  /* !defined(ASN_DISABLE_BER_SUPPORT) */
+
+#if !defined(ASN_DISABLE_XER_SUPPORT)
+xer_type_decoder_f SET_decode_xer;
+xer_type_encoder_f SET_encode_xer;
+#endif  /* !defined(ASN_DISABLE_XER_SUPPORT) */
+
+#if !defined(ASN_DISABLE_JER_SUPPORT)
+jer_type_decoder_f SET_decode_jer;
+jer_type_encoder_f SEQUENCE_encode_jer; /* X.697 29. (2021) */
+#endif  /* !defined(ASN_DISABLE_JER_SUPPORT) */
+
+#if !defined(ASN_DISABLE_UPER_SUPPORT)
+per_type_decoder_f SET_decode_uper;
+per_type_encoder_f SET_encode_uper;
+#endif  /* !defined(ASN_DISABLE_UPER_SUPPORT) */
+
+#if !defined(ASN_DISABLE_RFILL_SUPPORT)
+asn_random_fill_f  SET_random_fill;
+#endif  /* !defined(ASN_DISABLE_RFILL_SUPPORT) */
+
+extern asn_TYPE_operation_t asn_OP_SET;
+
+
+/* Check that all the mandatory members are present */
+int _SET_is_populated(const asn_TYPE_descriptor_t *td, const void *st);
+
+/***********************
+ * Some handy helpers. *
+ ***********************/
+
+/*
+ * Figure out whether the SET member indicated by PR_x has already been decoded.
+ * It is very simple bitfield test, despite its visual complexity.
+ */
+#define	ASN_SET_ISPRESENT(set_ptr, PR_x)				\
+	ASN_SET_ISPRESENT2(&((set_ptr)->_presence_map), PR_x)
+#define	ASN_SET_ISPRESENT2(map_ptr, PR_x)				\
+	(((unsigned int *)(map_ptr))					\
+		[(PR_x)	/ (8 * sizeof(unsigned int))]			\
+		& (1u << ((8 * sizeof(unsigned int)) - 1			\
+		- ((PR_x) % (8 * sizeof(unsigned int))))))
+
+#define	ASN_SET_MKPRESENT(map_ptr, PR_x)				\
+	(((unsigned int *)(map_ptr))					\
+		[(PR_x)	/ (8 * sizeof(unsigned int))]			\
+		|= (1u << ((8 * sizeof(unsigned int)) - 1		\
+		- ((PR_x) % (8 * sizeof(unsigned int))))))
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* _CONSTR_SET_H_ */