Remove apt-get based ngrep and upgrade

[philhagen]

Upgrade to latest (v1.47) from source

https://github.com/jpr5/ngrep

[ekristen]

I'll see what we can do to automate the build of this and get it hosted in the SIFT PPA.

[digitalsleuth]

Hi @philhagen, just going through some of the Issues and looking to help close them. I notice that the apt version of ngrep now matches the version at the repo you posted above, and it also looks as if the repo hasn't been updated in a while. Any chance this can be closed?

[ekristen]

@philhagen looks like our 20.04 build has ngrep 1.47, not sure on 18.04 yet.

[digitalsleuth]

@ekristen 18.04 has it as well. Confirmed on a few working systems. It's currently 1.4.7 in the Ubuntu 18 repo.

[ekristen]

@philhagen looks like the latest package, is that acceptable or do you think we need to maintain a build from the source?