Fix share/lua/README.txt HTTPd documentation
According to my
code review and testing, the vlc.httpd() Lua method does not take any
arguments and neither support HTTPS in the current VLC version. Also, the
documentation doesn't make it clear on what type of Lua modules it's
available, when it can only be used in the context of interfaces.
Some code snippets that seem to support the findings mentioned above:
modules/lua/intf.c#L258
modules/lua/libs/httpd.c#L82
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>