(as with old http interface). Also added '-Lua Web Interface-'.

Adding the '-Lua Web Interface-' will give an easy way for applications to tell whether they are dealing with the old or new interfaces. The commands are somewhat different, so this is important.
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>
(cherry picked from commit eb2becab3fe2e0872a3b6f21a71b95f3e2fcd2e6)