Lua 5.1 to 5.3 realignement phase 1

…cu#2914)

This reverts commit 32ad759.

Fixes nodemcu#2920

Fixes nodemcu#2928, nodemcu#2923

The internal implementation already preferentially forwards to the
encoder module, so we should just remove these functions as they confuse
people into thinking that we don't have their inverses (see the feature
request nodemcu#2907).

Update the docs to refer to the encoder version and add deprecation
warnings to the runtime implementations.

fix lfs upload issue

* clean effects library
* Fix several issues in ws2812 and effects
* Implement working way of calling shift from callback

* Remove app/include/netif/wlan_lwip_if.h

This file appears to be unused in our tree.

* New `net.if.info` call to show LwIP information

This is a generalization of `wifi.sta`'s and `wifi.ap`'s `getip` and
`getmac` calls.  I don't propose to deprecate those, but perhaps we
should, in the documentation, point users at this function instead.

The direct motivation is to permit continued use of DHCP-provided NTP
servers in a future where
nodemcu#2819 has landed, now
that nodemcu#2709 is in the
tree.  But rather than exposing just that information, a more general
interface seems useful.

The additional reporting, while nice, prevents the use of mispec on
integer-only builds

Prefer print everywhere.

This is probably unnecessary, but it served as a useful stepping stone
while building the expect-based library.  Probably an on-module test is
better for `file` and friends.

This one requires much more active participation on the host