scripts: debug: also print system info (#307)

It is important to know which kernel version is being, and the OS can
give some clues as well.

Signed-off-by: Matthieu Baerts (NGI0) <[email protected]>

Author: matttbe

scripts/mptcp-get-debug

@@ -63,6 +63,8 @@ collect_data_pre() {
         read -r _
     fi
 
+    cmd uname -a
+    cmd cat /etc/os-release
     cmd sysctl net.mptcp
     cmd ip mptcp endpoint show
     cmd ip mptcp limits show