POSTFIX_CONF.txt: make queries pgsql-compatible

... by changing WHERE ...=1 to WHERE ...='1' which should work with both
mysql and postgresql.

Reported by xpoint on IRC.

DOCUMENTS/POSTFIX_CONF.txt

@@ -65,7 +65,7 @@ user = postfix
 password = password
 hosts = localhost
 dbname = postfix
-query = SELECT goto FROM alias,alias_domain WHERE alias_domain.alias_domain = '%d' and alias.address = CONCAT('%u', '@', alias_domain.target_domain) AND alias.active = 1 AND alias_domain.active='1'
+query = SELECT goto FROM alias,alias_domain WHERE alias_domain.alias_domain = '%d' and alias.address = CONCAT('%u', '@', alias_domain.target_domain) AND alias.active='1' AND alias_domain.active='1'
 
 mysql_virtual_alias_domain_catchall_maps.cf:
 # handles catch-all settings of target-domain
@@ -73,7 +73,7 @@ user = postfix
 password = password
 hosts = localhost
 dbname = postfix
-query  = SELECT goto FROM alias,alias_domain WHERE alias_domain.alias_domain = '%d' and alias.address = CONCAT('@', alias_domain.target_domain) AND alias.active = 1 AND alias_domain.active='1'
+query  = SELECT goto FROM alias,alias_domain WHERE alias_domain.alias_domain = '%d' and alias.address = CONCAT('@', alias_domain.target_domain) AND alias.active='1' AND alias_domain.active='1'
 
 (See above note re Concat + PostgreSQL)
 
@@ -101,7 +101,7 @@ user = postfix
 password = password
 hosts = localhost
 dbname = postfix
-query = SELECT maildir FROM mailbox,alias_domain WHERE alias_domain.alias_domain = '%d' and mailbox.username = CONCAT('%u', '@', alias_domain.target_domain) AND mailbox.active = 1 AND alias_domain.active='1'
+query = SELECT maildir FROM mailbox,alias_domain WHERE alias_domain.alias_domain = '%d' and mailbox.username = CONCAT('%u', '@', alias_domain.target_domain) AND mailbox.active='1' AND alias_domain.active='1'
 
 
 (See above note re Concat + PostgreSQL)