stack erp5: enable utf8mb4 encoding support by default

stack/erp5/buildout.hash.cfg

@@ -42,7 +42,7 @@ md5sum = d32417746fcf671d4e86a70379815039
 
 [template-my-cnf]
 filename = my.cnf.in
-md5sum = af2113bbdeaf32096c4013fa73b45ced
+md5sum = a89eaf2d273a44475ea9febdc9008d6e
 
 [template-mariadb-initial-setup]
 filename = mariadb_initial_setup.sql.in

stack/erp5/my.cnf.in

@@ -66,8 +66,8 @@ server_id = {{ parameter_dict['server-id'] }}
 {{x}}sync_frm = 0
 
 # Force utf8 usage
-collation_server = utf8_unicode_ci
-character_set_server = utf8
+character_set_server = utf8mb4
+collation_server = utf8mb4_general_ci
 skip_character_set_client_handshake
 
 {% if 'ssl-key' in parameter_dict -%}