SrsContextId object creation can be improved on `srs_protocol_log.cpp`,
No need to create one, then assign it back. It seems a common mistake
for Cpp programmers.
---------
Co-authored-by: john <hondaxiao@tencent.com>
* v6.0, 2023-08-28, Merge [#3503](https://github.com/ossrs/srs/pull/3503): SrsContextId assignment can be improved without create a duplicated one. v6.0.70 (#3503)
* v6.0, 2023-08-28, Merge [#3781](https://github.com/ossrs/srs/pull/3781): HLS: Fix on_hls and hls_dispose critical zone issue. v6.0.69 (#3781)
* v6.0, 2023-08-28, Merge [#3768](https://github.com/ossrs/srs/pull/3768): Support include empty config file. v6.0.68 (#3768)
* v5.0, 2023-08-28, Merge [#3503](https://github.com/ossrs/srs/pull/3503): SrsContextId assignment can be improved without create a duplicated one. v5.0.175 (#3503)
* v5.0, 2023-08-28, Merge [#3781](https://github.com/ossrs/srs/pull/3781): HLS: Fix on_hls and hls_dispose critical zone issue. v5.0.174 (#3781)
* v5.0, 2023-08-28, Merge [#3768](https://github.com/ossrs/srs/pull/3768): Support include empty config file. v5.0.173 (#3768)