timeout(1): Some minor tweaks and improvements

[gbe]

Summary

• Define exit status and macros and use them
• Improve the second kill logic by setting 'do_second_kill = false' after configuring the second kill
• Minor style tweaks
• Reorder options in the man page, as well as the usage help
• Reorder the exit status in the man page
• Enhance the HISTORY section in the man page (obtained from NetBSD)

Obtained from: DragonFlyBSD

Test Plan

make in the timeout(1) source directory

[ziaee]

I wish we had any consensus on how we want to sort options. I'm partial to "-A -a -B -b --bee -C" sorting, but I don't want to bikeshed it. We have all different styles in the tree and any sorting is better!

bin/timeout/timeout.1

37

I like this!

212

Although if you want to do it the other way, .Fx would need to be on it's own line to render.

[gbe]

• address feedback (put .Fx on this on line)
• bump .Dd

[gbe]

@bapt @emaste any one for review? I have few other differentials in the making, but this one is the foundation for further mergers from modifications other BSDs have done.

[ziaee]

Manpage lgtm

[ziaee]

Just something to note I noticed today, style.mdoc(5) says not to use spaces in the synopsis pipes. This does conflict with the upstream mdoc style guides, and we more often seem to use spaces.