Update augeas to 1.12.0.

1.12.0 - 2019-04-13

      + General changes/additions
          o update gnulib to 91584ed6
      + Lens changes/additions
          o Anaconda: new lens to process /etc/sysconfig/anaconda instead of
            Shellvars (Pino Toscano) (Issue #597)
          o DevfsRules: add lens for FreeBSD devfs.rules files
          o Dovecot: permit ! in block titles (Nathan Ward) (Issue #599)
          o Hostname: Allow creation of hostname when file is missing (David
            Farrell) (Issue #606)
          o Krb5: add more pkinit_* options (Issue #603)
          o Logrotate: fix missing recognition of double quoted filenames
            (Issue #611)
          o Multipath: accept values enclosed in quotes (Issue #583)
          o Nginx: support unix sockets as server address (Issue #618)
          o Nsswitch: add merge action (Issue #609)
          o Pam: accept continuation lines (Issue #590)
          o Puppetfile: allow symbols as (optional) values (Issue #619) allow
            comments in entries (Issue #620)
          o Rsyslog: support dynamic file paths (Issue #622) treat #!/+/- as
            comment (arnolda, PR #595)
          o Syslog: accept 'include' directive (Issue #486)
          o Semanage: new lens to process /etc/selinux/semanage.conf instead of
            Simplevars (Pino Toscano) (Issue #594)
          o Shellvars: allow and/or in @if conditions (#582) accept functions
            wrapped in round brackets, accept variables with a dash in their
            name, exclude csh/tcsh profile scripts (Pino Toscano) (Issue #600)
            accept variable as command (Issue #601)
          o Ssh: accept RekeyLimit (Issue #605)
          o Sshd: accept '=' to separate option names from their values (Emil
            Dragu, #587)
          o Sudoers: support 'always_query_group_plugin' flag (Steve Traylen, #
            588)
          o Strongswan: parse lists. This is a backwards-incompatible change
            since list entries that were parsed into a single string are now
            split into a list of entries (Kaarle Ritvanen)
          o Toml: new lens to parse .toml files (PR #91)
          o Xorg: accept empty values for options (arnolda, PR #596)


(bsiegert)