MFH: r354559

Update to r44807 of the FreeBSD docset.

Approved by:	doceng (implicit)
MFH: r357873

Update to r45038 of the FreeBSD docset.

Approved by:	doceng (implicit)
MFH: r359083

Update to r45106 of the FreeBSD docset (a.k.a. 9.3-R version).

Approved by:	doceng (implicit)
Make sysutils/pstree operable in jailed environment.