MFC 204352, 208028, 209266, 209399, 210723, 213672, 215046:

MFC 204352, 208028, 209266, 209399, 210723, 213672, 215046:
- Fixed static linkage.
- Document that mptutil/mpt do not support RAID volumes in excess of 2TB.
- Report subcommand handler errors so that tools that invoke mptutil can
  robustly report errors.
- Save errno values before calling warn(3) so that errors are correctly
  reported.
- Check for malloc() failures.

git-svn-id: svn://svn.freebsd.org/base/stable/8@215534 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f