Fixes a number of problems with time/datetime <-> string conversion functions:

- bug #11655 "Wrong time is returning from nested selects - maximum time exists
- input and output TIME values were not validated properly in several conversion functions
- bug #20927 "sec_to_time treats big unsigned as signed"
- integer overflows were not checked in several functions. As a result, input values like 2^32 or 3600*2^32 were treated as 0
- BIGINT UNSIGNED values were treated as SIGNED in several functions
- in cases where both input string truncation and out-of-range TIME value occur, only 'truncated incorrect time value' warning was produced


include/my_time.h:
  Added defines for the TIME limits
  Added defines for the warning flags set by str_to_time() and check_time_range()
  Added check_time_range() declaration
mysql-test/r/func_sapdb.result:
  Fixed testcases which relied on incorrect TIMEDIFF() behaviour
mysql-test/r/func_time.result:
  Fixed testcase which relied on incorrect behaviour
  Added testcases for out-of-range values in SEC_TO_TIME(), TIME_TO_SEC(), ADDTIME(), SUBTIME() and EXTRACT()
mysql-test/t/func_time.test:
  Added testcases for out-of-range values in SEC_TO_TIME(), TIME_TO_SEC(), ADDTIME(), SUBTIME() and EXTRACT()
sql-common/my_time.c:
  Added check_time_range() to be used from str_to_time() and item_timefunc.cc
  Added new out-of-range flag to str_to_time() warnings
  Use '%u' instead of '%d' in my_*_to_str() because the arguments are unsigned
sql/field.cc:
  Replaced out-of-range checks with checks for flags returned by str_to_time()
sql/item_timefunc.cc:
  Added wrappers over make_datetime() and make_time() which perform out-of-range checks on input values
  Moved common code in Item_func_sec_to_time::val_str() and Item_func_sec_to_time::val_int() into a separate function sec_to_time()
  Replaced calls to make_datetime() with make_datetime_with_warn() in Item_func_add_time and Item_func_timediff
  Checks for 'unsigned int' overflows in Item_func_maketime
  Use make_time_with_warn() instead of make_time() in Item_func_maketime
  Fixed incorrect sizeof() in Item_func_str_to_date::get_time()
sql/time.cc:
  Check for return value of str_to_time() along with warning flags

mysql-test/t/func_time.test

@@ -358,4 +358,47 @@ create table t1 select now() - now(), curtime() - curtime(),
 show create table t1;
 drop table t1;
 
-# End of 4.1 tests
+#
+# Bug #11655: Wrong time is returning from nested selects - maximum time exists
+#
+# check if SEC_TO_TIME() handles out-of-range values correctly
+SELECT SEC_TO_TIME(3300000);
+SELECT SEC_TO_TIME(3300000)+0;
+SELECT SEC_TO_TIME(3600 * 4294967296);
+
+# check if TIME_TO_SEC() handles out-of-range values correctly
+SELECT TIME_TO_SEC('916:40:00');
+
+# check if ADDTIME() handles out-of-range values correctly
+SELECT ADDTIME('500:00:00', '416:40:00');
+SELECT ADDTIME('916:40:00', '416:40:00');
+
+# check if SUBTIME() handles out-of-range values correctly
+SELECT SUBTIME('916:40:00', '416:40:00');
+SELECT SUBTIME('-916:40:00', '416:40:00');
+
+# check if MAKETIME() handles out-of-range values correctly
+SELECT MAKETIME(916,0,0);
+SELECT MAKETIME(4294967296, 0, 0);
+SELECT MAKETIME(-4294967296, 0, 0);
+SELECT MAKETIME(0, 4294967296, 0);
+SELECT MAKETIME(0, 0, 4294967296);
+SELECT MAKETIME(CAST(-1 AS UNSIGNED), 0, 0);
+
+# check if EXTRACT() handles out-of-range values correctly
+SELECT EXTRACT(HOUR FROM '100000:02:03');
+
+# check if we get proper warnings if both input string truncation
+# and out-of-range value occur
+CREATE TABLE t1(f1 TIME);
+INSERT INTO t1 VALUES('916:00:00 a');
+SELECT * FROM t1;
+DROP TABLE t1;
+
+#
+# Bug #20927: sec_to_time treats big unsigned as signed
+#
+# check if SEC_TO_TIME() handles BIGINT UNSIGNED values correctly
+SELECT SEC_TO_TIME(CAST(-1 AS UNSIGNED));
+
+--echo End of 4.1 tests