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/r/mysqlbinlog_row_minimal.result

@@ -71,6 +71,7 @@ BEGIN
 ###   @7=6 /* INT meta=0 nullable=1 is_null=0 */
 ###   @8=7 /* INT meta=0 nullable=1 is_null=0 */
 ###   @9='' /* STRING(1) meta=65025 nullable=1 is_null=0 */
+# Number of rows: 1
 # at 1015
 #<date> server id 1  end_log_pos 1088 CRC32 XXX 	Query	thread_id=5	exec_time=x	error_code=0
 SET TIMESTAMP=X/*!*/;
@@ -99,6 +100,7 @@ BEGIN
 ###   @7=6 /* INT meta=0 nullable=1 is_null=0 */
 ###   @8=7 /* INT meta=0 nullable=1 is_null=0 */
 ###   @9=NULL /* STRING(1) meta=65025 nullable=1 is_null=1 */
+# Number of rows: 1
 # at 1330
 #<date> server id 1  end_log_pos 1403 CRC32 XXX 	Query	thread_id=5	exec_time=x	error_code=0
 SET TIMESTAMP=X/*!*/;
@@ -127,6 +129,7 @@ BEGIN
 ###   @7=6 /* INT meta=0 nullable=1 is_null=0 */
 ###   @8=7 /* INT meta=0 nullable=1 is_null=0 */
 ###   @9='A' /* STRING(1) meta=65025 nullable=1 is_null=0 */
+# Number of rows: 1
 # at 1646
 #<date> server id 1  end_log_pos 1719 CRC32 XXX 	Query	thread_id=5	exec_time=x	error_code=0
 SET TIMESTAMP=X/*!*/;
@@ -155,6 +158,7 @@ BEGIN
 ###   @7=6 /* INT meta=0 nullable=1 is_null=0 */
 ###   @8=7 /* INT meta=0 nullable=1 is_null=0 */
 ###   @9='A' /* STRING(1) meta=65025 nullable=1 is_null=0 */
+# Number of rows: 1
 # at 1962
 #<date> server id 1  end_log_pos 2035 CRC32 XXX 	Query	thread_id=5	exec_time=x	error_code=0
 SET TIMESTAMP=X/*!*/;
@@ -216,6 +220,7 @@ BEGIN
 ###   @7=6 /* INT meta=0 nullable=1 is_null=0 */
 ###   @8=7 /* INT meta=0 nullable=1 is_null=0 */
 ###   @9='A' /* STRING(1) meta=65025 nullable=1 is_null=0 */
+# Number of rows: 4
 # at 2354
 #<date> server id 1  end_log_pos 2427 CRC32 XXX 	Query	thread_id=5	exec_time=x	error_code=0
 SET TIMESTAMP=X/*!*/;
@@ -251,6 +256,7 @@ BEGIN
 ###   @5=NULL /* INT meta=0 nullable=1 is_null=1 */
 ### SET
 ###   @5=5 /* INT meta=0 nullable=1 is_null=0 */
+# Number of rows: 3
 # at 2665
 #<date> server id 1  end_log_pos 2738 CRC32 XXX 	Query	thread_id=5	exec_time=x	error_code=0
 SET TIMESTAMP=X/*!*/;
@@ -280,6 +286,7 @@ BEGIN
 ### DELETE FROM `test`.`t1`
 ### WHERE
 ###   @1=13 /* INT meta=0 nullable=0 is_null=0 */
+# Number of rows: 4
 # at 2927
 #<date> server id 1  end_log_pos 3000 CRC32 XXX 	Query	thread_id=5	exec_time=x	error_code=0
 SET TIMESTAMP=X/*!*/;
@@ -309,6 +316,7 @@ BEGIN
 ### DELETE FROM `test`.`t2`
 ### WHERE
 ###   @1=13 /* INT meta=0 nullable=0 is_null=0 */
+# Number of rows: 4
 # at 3189
 #<date> server id 1  end_log_pos 3262 CRC32 XXX 	Query	thread_id=5	exec_time=x	error_code=0
 SET TIMESTAMP=X/*!*/;