postgresql_extensible: Censor also other security related conn params

While these aren't quite as sensitive as passwords, they do tend to be
long filesystem paths that shouldn't be reported along with
every measurement.

plugins/inputs/postgresql_extensible/postgresql_extensible.go

@@ -184,7 +184,7 @@ type scanner interface {
 	Scan(dest ...interface{}) error
 }
 
-var passwordKVMatcher, _ = regexp.Compile("password=\\S+ ?")
+var KVMatcher, _ = regexp.Compile("(password|sslcert|sslkey|sslmode|sslrootcert)=\\S+ ?")
 
 func (p *Postgresql) SanitizedAddress() (_ string, err error) {
 	var canonicalizedAddress string
@@ -196,7 +196,7 @@ func (p *Postgresql) SanitizedAddress() (_ string, err error) {
 	} else {
 		canonicalizedAddress = p.Address
 	}
-	p.sanitizedAddress = passwordKVMatcher.ReplaceAllString(canonicalizedAddress, "")
+	p.sanitizedAddress = KVMatcher.ReplaceAllString(canonicalizedAddress, "")
 
 	return p.sanitizedAddress, err
 }