[mod_srs] add mod_srs

src/mod/endpoints/mod_srs/README.md

@@ -0,0 +1,8 @@
+# mod_srs
+
+mod_srs is hosted in a git repo as a standalone module <https://git.xswitch.cn/xswitch/mod_srs> .
+
+Talk to us if you have any questions: <https://github.com/rts-cn/rts/discussions> .
+
+Thank you using mod_srs.
+