Travis

[Wojtek242]

Fix and update Travis build:

1. Fix causes of failure: homebrew and required feature for streamlisten example.
2. Fix how clippy is run. Current advice is to run as cargo command, not a feature.
3. Remove nightly builds as they are unnecessary and time will be better spent adding windows builds.

The PR also slightly reformats a few things to make it easier to add Windows builds.

@sekineh I will leave the windows build setup to you, but this is what I set up on my branch: https://github.com/Wojtek242/pcap/blob/master/.travis.yml but I'm not a windows dev so there might be better ways of getting it done. I had quite the headache getting winpcap installed (chocolate install wasn't working for whatever reason).

This PR will be followed by a few more from my branch. Having builds working would make that easier.

[sekineh]

Hi, I'll review this tomorrow morning!

[Trolldemorted]

I guess this includes #86 and #89. Should I close them?

[Trolldemorted]

@Wojtek242 windows builds should work fine (at least they did 3 years ago) if you merge/incorporate #83 and #88. Winpcap has not been maintained for almost a decade, even wireshark ships npcap now, I recommend linking against npcap.

We have solved more bugs in this crate, I recommend that you take a look :)

If you switch to github actions, you might have a better time with your CI setup.

[sekineh]

Looks good to me.

For #113 windows CI, I'm going to use GitHub Actions because it's faster and easier than appveyor. When I make a PR for Windows CI, I might merge travis jobs into GitHub Actions. But for now fixing existing Travis job is the priority. Please go ahead.

[sekineh]

I guess this includes #86 and #89. Should I close them?

Nice suggestion!
@Wojtek242 , please add description "Closes #86, #89" or close it manually after PR merge.

[sekineh]

@Wojtek242 windows builds should work fine (at least they did 3 years ago) if you merge/incorporate #83 and #88. Winpcap has not been maintained for almost a decade, even wireshark ships npcap now, I recommend linking against npcap.

We have solved more bugs in this crate, I recommend that you take a look :)

If you switch to github actions, you might have a better time with your CI setup.

Thanks for suggestions. I'll look into PRs before implementing #113.
I'm still using WinPcap but consider npcap as primary target.