Update ISSUE_TEMPLATE.md

.github/ISSUE_TEMPLATE.md

@@ -11,3 +11,15 @@ Then run this on your server:
 tar -cvzPhf /tmp/etserverLogs.tar.gz /tmp/etserver_err /tmp/etserver.INFO
 
 The logs will contain the IP addresses & username of the client and server, but will not contain any of the data transmitted.
+
+If you are experiencing a crash, please also post a backtrace.  To do this, replace this line in your et script:
+
+CLIENT_BINARY="etclient"
+
+to this:
+
+CLIENT_BINARY="lldb -- etclient"
+
+then rerun with lldb and when it crashes, type "bt" to give me the stack trace.  If you are running the client under linux, replace with:
+
+CLIENT_BINARY="gdb --args etclient"