update pgsql plugin documentation

+ add SSL verification options
+ replace PGCLUSTER with PGHOST, former cements the use of a specific
  version of postgresql-client.

Git-Dch: Full

2 files changed, 6 insertions, 6 deletions

diff --git a/examples/psql b/examples/psql
index e2e72cb..3fc7102 100644
--- a/examples/psql
+++ b/examples/psql
@@ -3,8 +3,10 @@ PLUGIN=psql
 # the session was not interactive
 EXIT_IGNORE=2
 
-PGCLUSTER=8.3/db.example.com:
+PGHOST=db.example.com
 PGDATABASE=exampledb
+PGSSLMODE=verify-full
+PGSSLROOTCERT=/etc/ssl/certs/examplerootcert
 PGUSER=exampleuser
 PGPASSWORD=foobar # beware: will be readable from /proc/<pid>/environ, better:
 PGPASSFILE=/path/to/.pgpass
diff --git a/plugins/psql b/plugins/psql
index d1009ef..aa210d2 100755
--- a/plugins/psql
+++ b/plugins/psql
@@ -2,20 +2,18 @@
 
 # psql plugin
 #
-# uses psql to download a table (or view) of the form:
+# uses psql to download a TABLE (or VIEW) of the form:
 # CREATE TABLE known_hosts (
 #	namelist	text, # comma seperated
 #	type		text,
 #	key		text
 # );
+# alternatively only one column with spaces between those three
 #
 # ENVIRONMENT VARIABLES:
 #	TABLE		table to download
 # used by psql:
-#	PGCLUSTER	see pg_wrapper(1)
-#	PGDATABASE	see psql(1)
-#	PGUSER		..
-#	PGPASSFILE	..
+#	PG*		see psql(1)
 #
 
 set -e