textproc/augeas: update to 1.3.0

[mmoll]

Summary

swills@ is the maintainer. Besides the usual updating, I did some cleanups and moved the handling of /boot/loader.conf to the sysctl lens. This is something I would bring upstream, once accepted here.
Proposed commit message:

textproc/augeas: update to 1.3.0

Approved by:	swills (mentor, maintainer), mat (mentor)

Test Plan

poudriere: http://space.kvedulv.de/FreeBSD/augeas-1.3.0.log
portlint:

mmoll@marduk:/svn/ports/textproc/augeas$ portlint -ACNc
WARN: Makefile: [27]: use ${VARIABLE}, instead of $(VARIABLE).
0 fatal errors and 1 warning found.

[mmoll]

re-include LOCALBASE replacement

[swills]

Approved

[mmoll]

committed in rP387508