MFC r227536, r240967:

MFC r227536, r240967:

r227536 (nwhitehorn):

  Further automate production release generation by naming files the
  right things and generating checksums.

r240967:

 - Allow cross-architecture builds with 'generate-release.sh', which
   is set by specifying '-a <arch>'.  (Only supported for i386 on amd64
   and powerpc on powerpc64 currently).
 - Change how textproc/docproj is installed:
   o Attempt to install from pkg(8);
   o Fall back to pkg_add(1) if pkg(8) installation is not
     successful;
   o Fall back to installing from ports as last resort.
 - Ensure the script is run by root[1].
 - Get OSVERSION from param.h[1].

git-svn-id: svn://svn.freebsd.org/base/stable/9@242650 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f