Fix markup:

  .Pa --> path
  .Dv --> defined value
  .Ev --> environment variable
  .Fa --> function argument

Conflicts:
	pkg/pkg.conf.5
Use HTTPS to fetch bsd.pkgng.mk and execute as nobody
Issue #406:

Add new -n flag to pkg(1) itself.  This runs various sanity checks and
aborts without any action if the system is not correctly initialized
to use pkg as its package management system.

'pkg -n' without other arguments should be a good test for a system
being pkgng-enabled.

For best results it will be necessary to modify /usr/sbin/pkg to
recognise the -n flag in command lines and suppress the usual
bootstrapping action.
issue #403: Switch from 'pkg -n' to 'pkg -N' as the one true pkgng
activation status check.  Confusion was possible because'-n' was already
used extensively elsewhere on the command lines to mean 'dry-run',
whereas '-N' is otherwise currently unused.

Polish the wording in pkg.8 a little while here.
Finish fixing gcc stupidity
pkg2ng: Hard-code FORCE_POST if bsd.pkgng.mk not available
mdoc: Update Paths to .Pa

Conflicts:
	pkg/pkg-create.8
	pkg/pkg.8
pkg.8: Add example usage of how to use pkg -N safely
pkg.8: Reword example usage and add safer method
New Release 1.0.13