(Note the previous commit was a MFC of r216616).

(Note the previous commit was a MFC of r216616).

MFC r216620:

Initialize fp_location for explicitly managed fail points, and push
the parentheses around the location for simple fail points into the
location string.  This makes the print on fail point set more
consistent between the two versions.

Also fix up fail.h a little for style(9): only use one of sys/param.h
and sys/types.h, and use the existing __XSTRING() macro instead of
rolling our own.  Also fix up a few tabs on changed and nearby lines.

Lastly, since KFAIL_POINT_{BEGIN,END} are not meant for use outside
this file, just eliminate the macros entirely.

git-svn-id: svn://svn.freebsd.org/base/stable/8@217270 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f