* src/augtool.c (usage): fix spelling error
Added lens for Dovecot config files
Update NEWS
Add a lens for LVM metadata.
Add some autodoc comments.
Shellvars: reinstate /etc/sysconfig/network

Fixes #330, RHBZ#904222, RHBZ#920609
Add support for port ranges to /etc/services lens

The `/etc/services` file on AIX can contain entries with ranges of ports. This change allows Augeas to parse such files.

Example from an AIX /etc/services file:
    x11                      6000-6063/tcp  # X Window System
    x11                      6000-6063/udp  # X Window System
Nrpe: accept any config option, remove predefined list
Passwd: allow overrides in nisentry
Passwd: allow period in user names in spec (fixes #337)