Tengine can't talk to rsyslog if rsyslog restart about tengine

[cfsego]

thanks, this patch is good.
some log is lost are tolerable in our syslog module.
if we want to save the line, we have to reopen the file and retry to write immediately.
i will look at it.

[cfsego]

Oh, we expect that you will pull a request of your patch, and we will merge it.
Thank you for support

[zhuzhaoyuan]

@qlxucnappfolio
The rationale for requesting a "pull request" from you is to record your valuable contribution, so everybody can see it here: https://github.com/alibaba/tengine/contributors

See the documentation here for more information, if you don't know how to pull a request:
https://github.com/alibaba/tengine/wiki/%E5%A6%82%E4%BD%95%E5%8F%82%E4%B8%8ETengine%E5%BC%80%E5%8F%91
Thank you very much!