MFC: r208320

MFC:	r208320

Add a new build option, MAN_UTILS.  This option lets you control building
utilities and related support files for manual pages, which were previously
controlled by MAN.  For POLA, the default depends on MAN, i.e., WITHOUT_MAN
implies WITHOUT_MAN_UTILS and WITH_MAN implies WITH_MAN_UTILS.
Note this patch implicitly fixes a documentation bug of src.conf(5), which
says WITHOUT_MAN may be used to not build manual pages while it was also
disabling some utilities for manual pages.

Approved by:	re (kib)

git-svn-id: svn://svn.freebsd.org/base/stable/8@208546 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f