Make unaccent's install/uninstall scripts look more like all the others.

Set search_path explicitly, don't use IF EXISTS, etc.

contrib/unaccent/unaccent.sql.in

-/* $PostgreSQL: pgsql/contrib/unaccent/unaccent.sql.in,v 1.1 2009/08/18 10:34:39 teodor Exp $ */
+/* $PostgreSQL: pgsql/contrib/unaccent/unaccent.sql.in,v 1.2 2009/11/14 18:24:32 tgl Exp $ */
+
+-- Adjust this setting to control where the objects get created.
+SET search_path = public;
 
 CREATE OR REPLACE FUNCTION unaccent(regdictionary, text)
 	RETURNS text
 	AS 'MODULE_PATHNAME', 'unaccent_dict'
-	LANGUAGE C RETURNS NULL ON NULL INPUT IMMUTABLE;
+	LANGUAGE C STRICT;
 
 CREATE OR REPLACE FUNCTION unaccent(text)
 	RETURNS text
 	AS 'MODULE_PATHNAME', 'unaccent_dict'
-	LANGUAGE C RETURNS NULL ON NULL INPUT IMMUTABLE;
+	LANGUAGE C STRICT;
 
 CREATE OR REPLACE FUNCTION unaccent_init(internal)
 	RETURNS internal
@@ -25,9 +28,7 @@ CREATE TEXT SEARCH TEMPLATE unaccent (
 	LEXIZE = unaccent_lexize
 );
 
-
 CREATE TEXT SEARCH DICTIONARY unaccent (
 	TEMPLATE = unaccent,
 	RULES    = 'unaccent'
 );
-

contrib/unaccent/uninstall_unaccent.sql

-/* $PostgreSQL: pgsql/contrib/unaccent/uninstall_unaccent.sql,v 1.1 2009/08/18 10:34:39 teodor Exp $ */
+/* $PostgreSQL: pgsql/contrib/unaccent/uninstall_unaccent.sql,v 1.2 2009/11/14 18:24:32 tgl Exp $ */
 
-DROP FUNCTION IF EXISTS unaccent(regdictionary, text) CASCADE;
-DROP FUNCTION IF EXISTS unaccent(text) CASCADE;
-DROP TEXT SEARCH DICTIONARY IF EXISTS unaccent CASCADE;
-DROP TEXT SEARCH TEMPLATE IF EXISTS unaccent CASCADE;
-DROP FUNCTION IF EXISTS unaccent_init(internal) CASCADE;
-DROP FUNCTION IF EXISTS unaccent_lexize(internal,internal,internal,internal) CASCADE;
+-- Adjust this setting to control where the objects get dropped.
+SET search_path = public;
 
+DROP FUNCTION unaccent(regdictionary, text);
+DROP FUNCTION unaccent(text);
+DROP TEXT SEARCH DICTIONARY unaccent;
+DROP TEXT SEARCH TEMPLATE unaccent;
+DROP FUNCTION unaccent_init(internal);
+DROP FUNCTION unaccent_lexize(internal,internal,internal,internal);