mysqlbinlog now prints "# Number of rows" and stops on errors

Main problem was that no log-event print function checked for disk
full error on the IO_CACHE.
All changes in this patch only affects mysqlbinlog, not the server!

- Changed all log-event print functions to return 1 on error
- Fixed memory usage when not using --flashback.
- Added printing of number of rows in row events. Can be disabled with
  --print-row-count=0
- Print annotated rows when using mysqlbinlog --short-form
- Fixed that mysqlbinlog --debug works
- Fixed create_drop_binlog.test test failure
- Reorganized fields in PRINT_EVENT_INFO to be according to size to
  optimize storage
- Don't change print_row_event_position or print_row_counts if set by user
- Remove some testing of argument to my_free is 0
- base64-output=never is now supported and works in all context
- Updated help information for --base64-output and --short-form
- print_row_count is now on by default. Reset automatically if --short-form
  is used
- Removed obsolote warning for mysql 5.6.0
- More DBUG_PRINT for mysqltest.cc
- my_b_write_byte() now checks for flush failures. This fixed a memory
  overrun on disk full
- my_b_printf() now returns 1 on failure, 0 on ok.  This simplifies code
  and no old code was using the old return value of my_b_printf().
- my_b_Write_backtick_quote() now returns 1 on failure and 0 on ok
- Fixed some error conditions in log printing that was not previously
  handled.
- Slave_rows_error_report() can now handle longlong positions
- Write_on_release_cache() rewritten so that we can detect errors
  on flush. Not depending on automatic release anymore.
- Changed types for Pos and End_log_pos to 64 bit in SHOW BINLOG EVENTS
- Fixed that copy_event_cache_to_string_and_reinit() works with strings
  longer than 4G (Changed to use LEX_STRING instead of String)
- Restricted binlog_rows_event_max_size to UINT32_MAX-1 as String's are
  anyway restricted to UINT32_MAX
- Fixed bug in rpl_binlog_state::write_to_iocache() which hide write
  failures (duplicate variable name)
- Fixed bug in String::append if original string was not allocated
- Stop mysqlbinlog output at once if there is an error.
- Before printing error message, flush result file. This ensures that
  the error message is printed last. (Easier to find)

mysql-test/suite/binlog/r/flashback.result

@@ -100,6 +100,7 @@ BEGIN
 ###   @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */
 ###   @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */
 ###   @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */
+# Number of rows: 1
 # at #
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Xid = #
 COMMIT/*!*/;
@@ -125,6 +126,7 @@ BEGIN
 ###   @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */
 ###   @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */
 ###   @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */
+# Number of rows: 1
 # at #
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Xid = #
 COMMIT/*!*/;
@@ -150,6 +152,7 @@ BEGIN
 ###   @6='aaaaaaaaaa' /* STRING(10) meta=65034 nullable=1 is_null=0 */
 ###   @7='aaaaaaaaaaaaaaaaaaaa' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */
 ###   @8='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */
+# Number of rows: 1
 # at #
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Xid = #
 COMMIT/*!*/;
@@ -203,6 +206,7 @@ BEGIN
 ###   @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */
 ###   @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */
 ###   @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */
+# Number of rows: 2
 # at #
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Xid = #
 COMMIT/*!*/;
@@ -248,6 +252,7 @@ BEGIN
 ###   @6='aaaaaaaaaa' /* STRING(10) meta=65034 nullable=1 is_null=0 */
 ###   @7='aaaaaaaaaaaaaaaaaaaa' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */
 ###   @8='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */
+# Number of rows: 3
 # at #
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Xid = #
 COMMIT/*!*/;
@@ -272,18 +277,23 @@ ROLLBACK/*!*/;
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Annotate_rows:
 #Q> INSERT INTO t1 VALUES(0,0,0,0,0,'','','')
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Table_map: `test`.`t1` mapped to number #
+# Number of rows: 1
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Annotate_rows:
 #Q> INSERT INTO t1 VALUES(1,2,3,4,5, "abc", "abcdefg", "abcedfghijklmnopqrstuvwxyz")
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Table_map: `test`.`t1` mapped to number #
+# Number of rows: 1
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Annotate_rows:
 #Q> INSERT INTO t1 VALUES(127, 32767, 8388607, 2147483647, 9223372036854775807, repeat('a', 10), repeat('a', 20), repeat('a', 255))
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Table_map: `test`.`t1` mapped to number #
+# Number of rows: 1
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Annotate_rows:
 #Q> UPDATE t1 SET c01=100 WHERE c02=0 OR c03=3
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Table_map: `test`.`t1` mapped to number #
+# Number of rows: 2
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Annotate_rows:
 #Q> DELETE FROM t1
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Table_map: `test`.`t1` mapped to number #
+# Number of rows: 3
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Rotate to master-bin.000002  pos: 4
 #010909  9:46:40 server id 1  end_log_pos # CRC32 XXX 	Xid = #
 BEGIN/*!*/;