Extend srv6_hencap_red_l3vpn_test.sh to include checks for the new "tunsrc" feature. If there is no support for tunsrc, it silently falls back to the encap config without tunsrc. Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Justin Iurman <justin.iurman@6wind.com> Reviewed-by: Andrea Mayer <andrea.mayer@uniroma2.it> Link: https://patch.msgid.link/20260324091434.359341-3-justin.iurman@6wind.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>