kern/58240: Add support for proc/self/limits as used by Linux

[rbranco%suse.de@localhost]

>Number:         58240
>Category:       kern
>Synopsis:       Add support for proc/self/limits as used by Linux
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Thu May 09 19:00:00 +0000 2024
>Originator:     Ricardo Branco
>Release:        NetBSD 10.99.10
>Organization:
>Environment:
>Description:
Add support for proc/self/limits as used by Linux
>How-To-Repeat:

>Fix:
https://github.com/NetBSD/src/pull/37/