RFE: update genfscon documentation

[cgzones]

Partial paths can be used generally for virtual kernel filesystems, e.g. cgroup2, securityfs, selinuxfs, and not just for the proc filesystem.

The genfscon statement supports an optional filetype specifier.

[jbrindle]

@cgzones Any chance you can publish an update to this based on Stephen's comment above, or would you prefer us to pick it up?

[cgzones]

Updated the wording a bit, feel free to suggest improvements.

[stephensmalley]

Reviewed-by: Stephen Smalley stephen.smalley.work@gmail.com

[jbrindle]

reviewed-by: Joshua Brindle brindle@gmail.com