Improve Citrix Netscaler support

[JSCU-CNI]

This PR improves Citrix Netscaler support in Dissect.

• Add support for mounting the kernel root filesystem ("ramdisk") embedded in the kernel
• Improve Netscaler OS detection (filesystem detection, hostname, config parsing, language, install date, shell history)

[JSCU-CNI]

Is there some unit test you could add that at least tests a subset of the added features?

At this time, unfortunately not.

[Schamper]

At this time, unfortunately not.

Could you explain why, because of no time right now? In that case I can try to see if there's a willing soul that can create some mock tests.

[JSCU-CNI]

Could you explain why, because of no time right now? In that case I can try to see if there's a willing soul that can create some mock tests.

I have added some tests for the history, locale and generic plugins in a55c1b7. I do not have time to add a test that mocks an ELF section and mounts the FFS filesystem.

[codecov[bot]]

Codecov Report

:x: Patch coverage is 55.17241% with 39 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 80.73%. Comparing base (34a9714) to head (3dd0145). :warning: Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
dissect/target/plugins/os/unix/bsd/citrix/_os.py	33.33%	26 Missing :warning:
dissect/target/plugins/os/unix/bsd/_os.py	0.00%	6 Missing :warning:
...issect/target/plugins/os/unix/bsd/citrix/locale.py	82.60%	4 Missing :warning:
...ssect/target/plugins/os/unix/bsd/citrix/generic.py	87.50%	2 Missing :warning:
dissect/target/plugins/os/unix/generic.py	0.00%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1407      +/-   ##
==========================================
- Coverage   80.79%   80.73%   -0.07%     
==========================================
  Files         388      390       +2     
  Lines       34139    34217      +78     
==========================================
+ Hits        27584    27626      +42     
- Misses       6555     6591      +36     

Flag	Coverage Δ
unittests	80.73% <55.17%> (-0.07%)	:arrow_down:

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[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #1407 will not alter performance

_{Comparing JSCU-CNI:citrix-improvements (3dd0145) with main (0b743d3)[^unexpected-base]} [^unexpected-base]: No successful run was found on main (34a9714) during the generation of this report, so 0b743d3 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report.

Summary

✅ 9 untouched