Merge pull request #17 from ongres/addpercent

added percent simbol in like for history files

sql/WAL/distance_wals_from_dir.sql

@@ -2,7 +2,7 @@
 with oldest_mod_walfile as (
     select (substring(name from 9 for 8) || '/' || substring(name from 17 for 8 ))::pg_lsn as oldest_lsn
         from pg_ls_waldir() 
-        where name not ilike 'history' /* Skip .history files */
+        where name not ilike '%history%' /* Skip .history files */
         order by modification desc limit 1
 )
 select pg_size_pretty(pg_wal_lsn_diff( pg_current_wal_lsn(),oldest_lsn))