line with BSD/OS and Linux's username limits, making transitioning from
either operating system a lot easier than it is now. I'm currently
running with this change on my system, as are several others, and have
experienced no ill effects.
This is not for 2.2! This needs to get shaken out longer term in 3.0.
Previously-approved-by: davidg
man pages up to mdoc guidelines and fix some minor formatting glitches.
Also fixed a number of man pages to not abuse the .Xr macro to
display functions and path names and a lot of other junk.
