cap_*(2): Document ENOSYS behavior.

[delphij]

Summary

All cap_* system calls would fail when capability mode support is
not present.

MFC after: 2 weeks

[emaste]

Sounds reasonable, one little comment.

lib/libc/sys/cap_enter.2

116–117

"Currently running" seems redundant, and to me seems a bit awkward. How about "The running kernel..."

[pauamma_gundo.com]

lib/libc/sys/cap_enter.2

116–117

Even if not going for that suggestion, this noun phrase needs "the".

lib/libc/sys/cap_fcntls_limit.2

114

Same as above.

lib/libc/sys/cap_ioctls_limit.2

141

And again.

146–148

Repeats text from above.

lib/libc/sys/cap_rights_limit.2

124

The

[delphij]

Thanks for the detailed review! Could you please take another look at the updated changeset?

lib/libc/sys/cap_ioctls_limit.2

146–148

This is a different system call so technically it should stay. I've combined the common errors into one and have a separate listing for cap_ioctls_limit instead.

[delphij]

Address reviewer comments.

[pauamma_gundo.com]

Ignore the "request changes" from Doc Committers. I'm not allowed to approve as that group while under mentorship, but (unless I missed something) Phabricator didn't let me uncheck any checkboxes when I requested changes earlier. :-(