Add debugging hints for launchd / freeswitch conflict.s (#279)

* Add debugging hints for launchd / freeswitch conflict.s

Added instructions for finding processes using specific ports and stopping the Apple ftp proxy service.

* Update docs/FreeSWITCH-Explained/Installation/macOS/macOS-Testing-and-Diagnostics_13174550.mdx

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Co-authored-by: August <[email protected]>

Author: castorf

docs/FreeSWITCH-Explained/Installation/macOS/macOS-Testing-and-Diagnostics_13174550.mdx

@@ -144,4 +144,13 @@ All of these tools are supplied with macOS.
 
 To terminate press control+z.
 
+* Find processes using particular ports (e.g. port 8021 used by fs_cli to talk to freeswitch)
+```xml
+   lsof
+   sudo lsof -i TCP:8021 | grep 8021
+```
+Note that under some circumstances an Apple ftp proxy service can end up listening to port 8021. In that case `sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.ftp-proxy.plist` does the job of stopping the service.
+
+
+
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