Fix IPV6 detection

[aledbf]

Which issue this PR fixes: fixes #2904

[codecov-io]

Codecov Report

Merging #2905 into master will increase coverage by 0.06%.
The diff coverage is 54.54%.

@@            Coverage Diff             @@
##           master    #2905      +/-   ##
==========================================
+ Coverage   47.58%   47.65%   +0.06%     
==========================================
  Files          76       76              
  Lines        5491     5500       +9     
==========================================
+ Hits         2613     2621       +8     
+ Misses       2543     2541       -2     
- Partials      335      338       +3

Impacted Files	Coverage Δ
internal/net/net.go	75% <54.54%> (+2.27%)	⬆️
internal/watch/file_watcher.go	84.61% <0%> (+3.84%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 88e96de...123ffc0. Read the comment docs.

[antoineco]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf, antoineco

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [aledbf,antoineco]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment