Adding who, chroot, env and split.

Thanks "Galos, David" <galosd83@students.rowan.edu>!

who.1

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+.TH WHO 1 sbase\-VERSION
+.SH NAME
+who \- print who has logged on
+.SH SYNOPSIS
+.B who
+
+.SH DESCRIPTION
+.B who
+prints a list of who has logged on, their controlling tty, and the 
+time at which they logged on.
+
+.SH BUGS
+.B who
+relies on the utmp file to be updated responsibly. This
+doesn't always happen, which can cause who to print completely
+bogus data.
+
+musl\-libc currently implements all utmpx functions as stubs Obviously,
+this command cannot work under such conditions.
+
+.SH SEE ALSO
+.IR getutxent (3)
+.IR utmpx (5)
+