some bugfix.

gcc __attribute__ to check format compatible with arguments.
support \# comment in line

code: add zlog version, kick git hash away

bugfix: the last fix for check for time cache is not correct

still HardySimpson#13

doc: remove %D in doc and test*.conf

bugfix: let OS release zlog_thread_t when thread exit, simple zlog_re…

…load() and zlog_fini()

bugfix: the last fix for zlog_spec_write_time is not right.

bugfix: zlog_reload can cause a crash by freeing memory used by zlog_…

…spec_write_time.

see: HardySimpson#7

bugfix: rule read "aa.log" without comma and file_limit

doc: a little bug fix

bugfix: typo ddzlog