K 10 svn:author V 7 rpokala K 8 svn:date V 27 2019-04-03T03:30:57.693569Z K 7 svn:log V 465 MFC r345457: Add descriptions for sysctls in kern_mib.c and sysctl.3 which lack them. r343532 noted the difference between "hw.realmem" and "hw.physmem", which I was previously unaware of. I discovered that neither sysctl had a description visible via `sysctl -d', so I found where they were defined and added suitable descriptions. While in the file, I went ahead and added descriptions for all the others which lacked them. I also updated sysctl.3 accordingly. END