version with added end-log and end-log-pos options to save_binary_logs

By default, save_binary_logs saves everything from given position at a given file till the end of binary logs. Patch released here adds an optional stop arguments: end_log_pos and end_log_num.

Pre-ipv6 support release

0.57-1

v0.58a1

This release is created merely for tagging purposes.