Delete recommendations to mount fdescfs

[asomers]

fdescfs used to be useful to help Python more quickly close file descriptors before exec(). But for years, Python has been using closefrom() instead. All versions of Python 3.9 and later do that.

Fixes #39

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• Explain the feature
• Read CONTRIBUTING.md

[coveralls]

Pull Request Test Coverage Report for Build 11260497611

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.008%) to 7.746%

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Totals
Change from base Build 11083369461:	0.008%
Covered Lines:	798
Relevant Lines:	7796

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💛 - Coveralls

[sporkman]

This is great, one more thing I don't have to modify on the host!

Slightly OT, but are there any ways to get a quicker output out of something like "iocage list"? That takes about 2.5 seconds (real 0m2.425s) which is just slow enough to be annoying. I tend to use "jls", but that doesn't show inactive jails, which in my environment can be a little misleading. It is fast though (real 0m0.002s).

[asomers]

This is great, one more thing I don't have to modify on the host!

Slightly OT, but are there any ways to get a quicker output out of something like "iocage list"? That takes about 2.5 seconds (real 0m2.425s) which is just slow enough to be annoying. I tend to use "jls", but that doesn't show inactive jails, which in my environment can be a little misleading. It is fast though (real 0m0.002s).

The only way I know of to speed up "iocage list" is to not use Python :( .