Log message:
Fix indentation in buildlink3.mk files.

The actual fix as been done by "pkglint -F */*/buildlink3.mk", and was
reviewed manually.

There are some .include lines that still are indented with zero spaces
although the surrounding .if is indented. This is existing practice.

Log message:
Update Augeas to 1.9.0.

The changelog is too long for this commit message, go find it at
https://github.com/hercules-team/augeas/releases and
http://augeas.net/news.html.

Note that 1.8.1 included the following:
Fix error in handling escaped whitespace at the end of path expressions
(addresses CVE-2017-7555).

Log message:
Add SHA512 digests for distfiles for sysutils category

Problems found with existing digests:
	Package memconf distfile memconf-2.16/memconf.gz
	b6f4b736cac388dddc5070670351cf7262aba048 [recorded]
	95748686a5ad8144232f4d4abc9bf052721a196f [calculated]

Problems found locating distfiles:
	Package dc-tools: missing distfile dc-tools/abs0-dc-burn-netbsd-1.5-0-gae55ec9
	Package ipw-firmware: missing distfile ipw2100-fw-1.2.tgz
	Package iwi-firmware: missing distfile ipw2200-fw-2.3.tgz
	Package nvnet: missing distfile nvnet-netbsd-src-20050620.tgz
	Package syslog-ng: missing distfile syslog-ng-3.7.2.tar.gz

Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden).  All existing
SHA1 digests retained for now as an audit trail.

Log message:
Needs readline/editline.

Log message:
Add buildlink file for the augeas library.

Log message:
Add a package for augeas-1.3.0. From DESCR:

Augeas is a configuration editing tool. It parses configuration files in
their native formats and transforms them into a tree. Configuration
changes are made by manipulating this tree and saving it back into
native config files.

Augeas is:
- An API provided by a C library
- A command line tool to manipulate configuration from the shell (and
  shell scripts)
- Language bindings to do the same from your favorite scripting language
- Canonical tree representations of common configuration files
- A domain-specific language to describe configuration file formats

Augeas goals:
- Manipulate configuration files safely, safer than the ad-hoc
  techniques generally used with grep, sed, awk and similar mechanisms
  in scripting languages
- Provide a local configuration API for Linux
- Make it easy to integrate new config files into the Augeas tree