postgresql.conf can't be parsed due to password_encryption = scram-sha-256

[marcinbarczynski]

Since PostgreSQL 10 password_encryption is enum. If the value is set to scram-sha-256 (which contains hyphens), saving postgresql.conf with augeas fails with:

saving failed (run 'errors' for details)
Error in /var/lib/pgsql/13/data/postgresql.conf:782.0 (parse_skel_failed)
  Iterated lens matched less than it should
  Lens: /usr/share/augeas/lenses/dist/postgresql.aug:69.10-.46:
    Last matched: /usr/share/augeas/lenses/dist/postgresql.aug:30.10-.46:
    Next (no match): /usr/share/augeas/lenses/dist/quote.aug:117.2-.35:

This is because hyphen is not included in the definition of string that doesn't require quoting:

augeas/lenses/postgresql.aug

Line 34 in 299979d

let word_opt_quot_re = /[A-Za-z][A-Za-z0-9_]*/

I fixed it by adding - to the regex.

[raphink]

Closed by #701