Add networking/traceroute

[Arcterus]

TCP and IPv6 support still need to be added (AFAICT my ISP doesn't support IPv6 so I can't really test it even if I added support). TCP was giving me issues so I have decided to shelve it for now (we can probably just open an issue so someone can come along and work on it later).

There are some FIXMEs and such still in the code that I haven't yet gotten around to fixing. Several are regarding output formatting (like what to do when the first connection times out by the second connection attempt to the same hop succeeds), but one or two involve malformed packets.

[codecov]

Codecov Report

Merging #48 into master will decrease coverage by 0.41%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master      #48      +/-   ##
==========================================
- Coverage   19.73%   19.32%   -0.42%     
==========================================
  Files          46       47       +1     
  Lines        4677     4912     +235     
  Branches     1083     1158      +75     
==========================================
+ Hits          923      949      +26     
- Misses       3367     3565     +198     
- Partials      387      398      +11

Impacted Files	Coverage Δ
libmesabox/src/lib.rs	59.01% <ø> (ø)	⬆️
libmesabox/src/networking/traceroute.rs	0% <0%> (ø)
libmesabox/src/util/platform/unix.rs	0% <0%> (ø)	⬆️
libmesabox/src/posix/sh/parser.rs	0% <0%> (ø)	⬆️
libmesabox/src/networking/ping/mod.rs	0% <0%> (ø)	⬆️
libmesabox/src/lsb/tar/mod.rs	0% <0%> (ø)	⬆️
libmesabox/src/posix/chmod.rs	24.11% <0%> (+0.14%)	⬆️
libmesabox/src/util/mod.rs	53.68% <0%> (+0.49%)	⬆️
libmesabox/src/posix/sh/mod.rs	32.28% <0%> (+0.74%)	⬆️
... and 1 more

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