lime.network.scandevices: fix finding intefaces on dsa devices

[pony1k]

On devices that have only a single lan port, like D-Link DAP-X1860 A1, with DSA, the lan port is just called lan, not lan1 as one might expect. This changes a regex ^lan%d+$ to ^lan%d*$, so that the lan interface is correctly recognized and configured. Instead of just scraping eth0, eth1, ... from /sys/class/net/, the second commit adds scraping of lan, lan1, lan2, ... aswell. Without this, lanx-interaces are not configured if they do not appear in the configuration.

[codecov-commenter]

Codecov Report

Merging #1033 (63d6012) into master (06053e3) will decrease coverage by 0.01%. The diff coverage is 100.00%.

:exclamation: Current head 63d6012 differs from pull request most recent head a1a6e3e. Consider uploading reports for the commit a1a6e3e to get more accurate results

:exclamation: Your organization is not using the GitHub App Integration. As a result you may experience degraded service beginning May 15th. Please install the Github App Integration for your organization. Read more.

@@            Coverage Diff             @@
##           master    #1033      +/-   ##
==========================================
- Coverage   79.27%   79.26%   -0.01%     
==========================================
  Files          53       53              
  Lines        4444     4447       +3     
==========================================
+ Hits         3523     3525       +2     
- Misses        921      922       +1     

Impacted Files	Coverage Δ
...ges/lime-system/files/usr/lib/lua/lime/network.lua	78.39% <100.00%> (+0.20%)	:arrow_up:

... and 1 file with indirect coverage changes

:mega: We’re building smart automated test selection to slash your CI/CD build times. Learn more

[ilario]

Looks good for me, both commits! @spiccinini @G10h4ck

[ilario]

Did you check on another device, one that has more than one LAN port, if the generated /etc/config/network is different before and after these edits?

[pony1k]

It is used in production on devices with multiple ports with and without dsa (Linksys E8450 (UBI), TP-LINK TD-W8970, AVM FRITZ!Box 4040, TP-Link TL-WDR3600 v1). I did not do a direct comparison before and after, but the configuration looks good and it is working normally. I checked that there is nothing called lan in the devices that have lan1, lan2, ... in /sys/class/net/ and lan is the only additional string that the regex matches, so it should be fine.