[kernel] Various small fixes, source documenation enhancements#2396
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[kernel] Various small fixes, source documenation enhancements#2396
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Various small updates seen while perusing kernel source.
Adds comments to some kernel code for clarification.
Removes some unneeded "optimizations" that did nothing.
Corrects SIGCHLD signal sent at program exit to parent to be sent as "privileged" (doesn't require root privileges).