PHPBB3-10609

PHPBB3-9916

* develop-olympus:
  [ticket/10252] Correctly document behaviour of acl_get_list() for a_ permission

Be careful when using this function with permissions a_, m_, u_ and f_ ! It may not work correctly. When a user group grants an a_* permission, e.g. a_foo, but the user's a_foo permission is set to "Never", then the user does not in fact have the a_ permission. But the user will still be listed as having the a_ permission.

PHPBB3-10252

* develop-olympus:
  [ticket/9992] Clarify explanations of ip and account limits on login
  [ticket/9992] Add a comma to language for IP_LOGIN_LIMIT_MAX_EXPLAIN
  [ticket/9992] Use sql_fetchfield for single row and single column result
  [ticket/9992] Adding a limit on login attempts per IP.
  [ticket/9992] Make sql_create_table and sql_table_exists available in updater

A new table was created to save all failed login attempts with
corresponding information on username, ip and useragent. By default
the limit is 50 login attempts within 6 hours per IP. The limit is
relatively high to avoid big problems on sites behind a reverse
proxy that don't receive the forwarded-for value as REMOTE_ADDR but
see all users as coming from the same IP address. But if these
users run into problems a special forwarded-for option is available
to limit logins by forwarded-for value instead of ip.

PHPBB3-9992

* develop-olympus:
  [ticket/10141] Save a hash lookup when value is not in cache.
  [ticket/10141] Split double-assignment into conditional and unconditional part.
  [ticket/10141] Use a cache in $auth->_fill_acl() for better performance.

PHPBB3-10141

PHPBB3-10141

Many sequences being converted are the same. Use a local cache to
convert each sequence once, speeding up the function.

PHPBB3-10141