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diff --git a/external/unbound/ldns/parseutil.h b/external/unbound/ldns/parseutil.h
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+++ b/external/unbound/ldns/parseutil.h
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+/*
+ * parseutil.h - parse utilities for string and wire conversion
+ *
+ * (c) NLnet Labs, 2004
+ *
+ * See the file LICENSE for the license
+ */
+/**
+ * \file
+ *
+ * Utility functions for parsing, base32(DNS variant) and base64 encoding
+ * and decoding, Hex, Time units, Escape codes.
+ */
+
+#ifndef LDNS_PARSEUTIL_H
+#define LDNS_PARSEUTIL_H
+struct tm;
+
+/** 
+ *  A general purpose lookup table
+ *  
+ *  Lookup tables are arrays of (id, name) pairs,
+ *  So you can for instance lookup the RCODE 3, which is "NXDOMAIN",
+ *  and vice versa. The lookup tables themselves are defined wherever needed,
+ *  for instance in host2str.c
+ */
+struct sldns_struct_lookup_table {
+        int id;
+        const char *name;
+};
+typedef struct sldns_struct_lookup_table sldns_lookup_table;
+
+/**
+ * Looks up the table entry by name, returns NULL if not found.
+ * \param[in] table the lookup table to search in
+ * \param[in] name what to search for
+ * \return the item found
+ */
+sldns_lookup_table *sldns_lookup_by_name(sldns_lookup_table table[],
+                                       const char *name);
+/**
+ * Looks up the table entry by id, returns NULL if not found.
+ * \param[in] table the lookup table to search in
+ * \param[in] id what to search for
+ * \return the item found
+ */
+sldns_lookup_table *sldns_lookup_by_id(sldns_lookup_table table[], int id);
+
+/**
+ * Convert TM to seconds since epoch (midnight, January 1st, 1970).
+ * Like timegm(3), which is not always available.
+ * \param[in] tm a struct tm* with the date
+ * \return the seconds since epoch
+ */
+time_t sldns_mktime_from_utc(const struct tm *tm);
+
+/**
+ * The function interprets time as the number of seconds since epoch
+ * with respect to now using serial arithmitics (rfc1982).
+ * That number of seconds is then converted to broken-out time information.
+ * This is especially usefull when converting the inception and expiration
+ * fields of RRSIG records.
+ *
+ * \param[in] time number of seconds since epoch (midnight, January 1st, 1970)
+ *            to be intepreted as a serial arithmitics number relative to now.
+ * \param[in] now number of seconds since epoch (midnight, January 1st, 1970)
+ *            to which the time value is compared to determine the final value.
+ * \param[out] result the struct with the broken-out time information
+ * \return result on success or NULL on error
+ */
+struct tm * sldns_serial_arithmitics_gmtime_r(int32_t time, time_t now, struct tm *result);
+
+/**
+ * converts a ttl value (like 5d2h) to a long.
+ * \param[in] nptr the start of the string
+ * \param[out] endptr points to the last char in case of error
+ * \return the convert duration value
+ */
+uint32_t sldns_str2period(const char *nptr, const char **endptr);
+
+/**
+ * Returns the int value of the given (hex) digit
+ * \param[in] ch the hex char to convert
+ * \return the converted decimal value
+ */
+int sldns_hexdigit_to_int(char ch);
+
+/**
+ * calculates the size needed to store the result of b64_ntop
+ */
+size_t sldns_b64_ntop_calculate_size(size_t srcsize);
+
+int sldns_b64_ntop(uint8_t const *src, size_t srclength,
+	char *target, size_t targsize);
+
+/**
+ * calculates the size needed to store the result of sldns_b64_pton
+ */
+size_t sldns_b64_pton_calculate_size(size_t srcsize);
+
+int sldns_b64_pton(char const *src, uint8_t *target, size_t targsize);
+
+/**
+ * calculates the size needed to store the result of b32_ntop
+ */
+size_t sldns_b32_ntop_calculate_size(size_t src_data_length);
+
+size_t sldns_b32_ntop_calculate_size_no_padding(size_t src_data_length);
+
+int sldns_b32_ntop(const uint8_t* src_data, size_t src_data_length,
+	char* target_text_buffer, size_t target_text_buffer_size);
+
+int sldns_b32_ntop_extended_hex(const uint8_t* src_data, size_t src_data_length,
+	char* target_text_buffer, size_t target_text_buffer_size);
+
+/**
+ * calculates the size needed to store the result of b32_pton
+ */
+size_t sldns_b32_pton_calculate_size(size_t src_text_length);
+
+int sldns_b32_pton(const char* src_text, size_t src_text_length,
+	uint8_t* target_data_buffer, size_t target_data_buffer_size);
+
+int sldns_b32_pton_extended_hex(const char* src_text, size_t src_text_length,
+	uint8_t* target_data_buffer, size_t target_data_buffer_size);
+
+/*
+ * Checks whether the escaped value at **s is an octal value or
+ * a 'normally' escaped character (and not eos)
+ *
+ * @param ch_p: the parsed character
+ * @param str_p: the string. moved along for characters read.
+ * The string pointer at *s is increased by either 0 (on error), 1 (on
+ * normal escapes), or 3 (on octals)
+ *
+ * @return 0 on error
+ */
+int sldns_parse_escape(uint8_t *ch_p, const char** str_p);
+
+/** 
+ * Parse one character, with escape codes,
+ * @param ch_p: the parsed character
+ * @param str_p: the string. moved along for characters read.
+ * @return 0 on error
+ */
+int sldns_parse_char(uint8_t *ch_p, const char** str_p);
+
+#endif /* LDNS_PARSEUTIL_H */