Fix missing ldapscheme option in pg_hba_file_rules()

The ldapscheme option was missed when inspecing the HbaLine for
assembling rows for the pg_hba_file_rules function.  Backpatch
to all supported versions.

Author: Laurenz Albe <laurenz.albe@cybertec.at>
Reported-by: Laurenz Albe <laurenz.albe@cybertec.at>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Bug: 18769
Discussion: https://postgr.es/m/18769-dd8610cbc0405172@postgresql.org
Backpatch-through: v13

src/backend/utils/adt/hbafuncs.c

@@ -88,6 +88,10 @@ get_hba_options(HbaLine *hba)
 			options[noptions++] =
 				CStringGetTextDatum(psprintf("ldapport=%d", hba->ldapport));
 
+		if (hba->ldapscheme)
+			options[noptions++] =
+				CStringGetTextDatum(psprintf("ldapscheme=%s", hba->ldapscheme));
+
 		if (hba->ldaptls)
 			options[noptions++] =
 				CStringGetTextDatum("ldaptls=true");