Support ingress bandwidth shaping with tunneldigger

[kaechele]

Fix for #1447

Signed-off-by: Felix Kaechele felix@kaechele.ca

[rotanid]

@kaechele have you tested this with firmwares with and without tunneldigger?

[kaechele]

Only tested on firmware with tunneldigger so far.
As im moving to the US right now I unfortunately don't have the time to do further testing in the next 3-4 weeks.

[rotanid]

ok, but as there are the has_tunneldigger checks i don't see any problem for non-tunneldigger

[lrnzo]

Hello,

I do not understand two things:

1. why is there no uci:set('tunneldigger', 'mesh_vpn', 'limit_bw_up', site.mesh_vpn.bandwidth_limit.egress()) in package/gluon-mesh-vpn-core/luasrc/lib/gluon/upgrade/500-mesh-vpn?
2. why do i have the impression that uci:get("tunneldigger", "mesh_vpn", "limit_bw_down") from line 52 of package/gluon-config-mode-mesh-vpn/luasrc/lib/gluon/config-mode/wizard/0300-mesh-vpn.lua fails? When i check the box "limit bandwitdth" on a newly installed l2tp-firmware (gluon v2018.2.x) it looks like so:
   

In the site.conf i have this:

bandwidth_limit = {
	enabled = false,
	ingress = 100,
	egress = 200,
}