Fix minor spelling nit-picks

These were found by the "codespell" tool.

NEWS

@@ -209,7 +209,7 @@ Knot DNS 2.4.1 (2017-02-10)
 Improvements:
 -------------
  - Speed-up of rdata addition into a huge rrset
- - Introduce check of minumum timeout for next refresh
+ - Introduce check of minimum timeout for next refresh
  - Dnsproxy module can forward all queries without local resolving
 
 Bugfixes:

doc/operation.rst

@@ -267,7 +267,7 @@ causing freeze pending. So we watch the zone status until frozen. Then we can fl
 frozen zone contents.
 
 Now we open a text editor and perform desired changes to the zone file. It's necessary
-to **increase SOA serial** in this step to keep consistency. Finaly, we can load the
+to **increase SOA serial** in this step to keep consistency. Finally, we can load the
 modified zone file and if successful, thaw the zone.::
 
     $ knotc zone-reload example.com.

src/contrib/time.h

@@ -152,7 +152,7 @@ inline static knot_time_t knot_time_from_u32(uint32_t u32time)
  * U                     - Matches one of Y, M, D, h, m, s in the timespec standing for a time unit.
  * u                     - Like U, but the unit in the timestamp is from: y, mo, d, h, mi, s.
  *
- * \retval -1  An error occured, out_time has no sense.
+ * \retval -1  An error occurred, out_time has no sense.
  * \return  0  OK, timestamp parsed successfully.
  */
 int knot_time_parse(const char *format, const char *timespec, knot_time_t *time);
@@ -165,7 +165,7 @@ int knot_time_parse(const char *format, const char *timespec, knot_time_t *time)
  * \param dst      The destination buffer pointer with text-formatted timestamp.
  * \param dst_len  The destination buffer length.
  *
- * \retval -1 An error occured, the buffer may be filled with nonsense.
+ * \retval -1 An error occurred, the buffer may be filled with nonsense.
  * \return  0 OK, timestamp printed successfully.
  */
 int knot_time_print(knot_time_print_t format, knot_time_t time, char *dst, size_t dst_len);

src/knot/common/stats.c

@@ -143,7 +143,7 @@ static void dump_to_file(FILE *fd, server_t *server)
 {
 	char date[64] = "";
 
-	// Get formated current time string.
+	// Get formatted current time string.
 	struct tm tm;
 	time_t now = time(NULL);
 	localtime_r(&now, &tm);

src/knot/updates/apply.h

@@ -97,7 +97,7 @@ int apply_prepare_to_sign(apply_ctx_t *ctx);
 /*!
  * \brief Applies changesets directly to the zone, without copying it.
  *
- * \warning Modified zone is in inconsitent state after error and should be freed.
+ * \warning Modified zone is in inconsistent state after error and should be freed.
  *
  * \param ctx     Apply context.
  * \param chsets  List of changesets to be applied to the zone.

src/knot/zone/timers.c

@@ -24,7 +24,7 @@
  * # Timer database
  *
  * Timer database stores timestaps of events which need to be retained
- * accross server restarts. The key in the database is the zone name in
+ * across server restarts. The key in the database is the zone name in
  * wire format. The value contains serialized timers.
  *
  * # Serialization format
@@ -95,7 +95,7 @@ static int serialize_timers(const zone_timers_t *timers, uint8_t *data, size_t s
 /*!
  * \brief Deserialize timers from a binary buffer.
  *
- * \note Unkown timers are ignored.
+ * \note Unknown timers are ignored.
  */
 static int deserialize_timers(zone_timers_t *timers_ptr,
                               const uint8_t *data, size_t size)

src/knot/zone/zone-load.h

@@ -34,7 +34,7 @@ int zone_load_contents(conf_t *conf, const knot_dname_t *zone_name,
 /*!
  * \brief Update zone contents from the journal.
  *
- * \warning If error, the zone is in inconsitent state and should be freed.
+ * \warning If error, the zone is in inconsistent state and should be freed.
  *
  * \param conf
  * \param zone

tests-extra/tests/events/freeze_thaw/test.py

@@ -30,7 +30,7 @@ resp.check(rcode="NXDOMAIN", nordata="1.2.3.4")
 
 slave.ctl("zone-refresh")
 
-# check that slave transfered when invoked from ctl
+# check that slave transferred when invoked from ctl
 slave.zone_wait(zone, serial=2, equal=True)
 resp = slave.dig("added.example.", "A")
 resp.check(rcode="NOERROR", rdata="1.2.3.4")

tests-extra/tests/modules/stats/test.py

@@ -74,13 +74,13 @@ resp = knot.dig(zones[1].name, "TYPE11", tries=1, udp=True)
 query_size3 = resp.query_size()
 reply_size3 = resp.response_size()
 
-# Sucessfull transfer.
+# Successful transfer.
 resp = knot.dig(zones[0].name, "AXFR", tries=1)
 resp.check_xfr(rcode="NOERROR")
 xfr_query_size = resp.query_size()
 # Cannot get xfr_reply_size :-/
 
-# Successfull update.
+# Successful update.
 up = knot.update(zones[1])
 up.add(zones[1].name, "3600", "AAAA", "::1")
 up.send("NOERROR")

tests/contrib/test_heap.c

@@ -84,7 +84,7 @@ int main(int argc, char *argv[])
 	ok(valid, "heap_insert");
 	ok(!EMPTY_HEAP(&heap), "heap is non-empty");
 
-	// excercise heap_insert
+	// exercise heap_insert
 
 	valid = true;
 	for (int i = 0; i < VALUE_COUNT; i++) {
@@ -95,7 +95,7 @@ int main(int argc, char *argv[])
 	}
 	ok(valid, "heap_find");
 
-	// excercise heap_replace
+	// exercise heap_replace
 
 	assert(VALUE_REPLACE <= VALUE_COUNT);
 	struct value *replaced = calloc(VALUE_REPLACE, sizeof(struct value));
@@ -118,7 +118,7 @@ int main(int argc, char *argv[])
 	}
 	ok(valid, "heap_replace");
 
-	// excercise heap_delete
+	// exercise heap_delete
 
 	assert(VALUE_REPLACE + VALUE_DELETE < VALUE_COUNT);
 
@@ -139,7 +139,7 @@ int main(int argc, char *argv[])
 	}
 	ok(valid, "heap_delete");
 
-	// excercise item retrieval
+	// exercise item retrieval
 
 	assert(VALUE_COUNT > VALUE_DELETE);