This is a locale independent version of basename to work around
https://bugs.php.net/bug.php?id=37738

The function is not yet used anywhere. It should be at least used
where ever non-ASCII filenames and paths are handled. Simply replacing
all calls to basename() with this function might be the safest.

these are already checked in init.php, so we can save some space here

This disables some caches which use static variables in order to prevent
parsing or rendering of the same page more than once during a run and
also disables the cache of parser modes. This means we can no longer
test this behavior but at least it fixes syntax plugin tests and tests
which change pages in order to test certain caching behaviors.

The alt text is now the page id as it is the media id for media changes,
previously it was empty as $filename is undefined in that context.

action dropdown: when label is missing, for accessibility reasons form element should at least have title

* 'ldap_multi_server' of git://github.com/DvaSlona/dokuwiki:
  Config method changed from array to comma separated string.
  Allow multiple LDAP servers.

added farms to the core

as discussed at https://github.com/splitbrain/dokuwiki/pull/115

This changes the caching system to expire caches when the last modified time of
a dependency is equal to the cache file except for the meta file where the old
check is kept in order to avoid additional renderer calls and possible circular
dependencies. This avoids stale cache files but means that the parser and
renderer could now be called more than once after an edit but we currently
don't have a better fix for that.

consider empty files as no file in installer

This makes sure that the animal that is specified in the URL is actually
a subdirectory inside the farm and not somewhere else in the system.
This allows that the animals are organized in different subdirectories
for more complicated farm setups.

Now the animal can be specified in the animal environment variable.

* extracted most farm code into inc/farm.php
* by default farm.php is nowhere included
* added preload.php.dist as an example farm setup
* farm.php can be included in preload.php to activate farming

allow empty config file to proceed installation as we package default
config empty in first install

as packager may provide empty file in package, to ensure correct
file permissions.

import old patch:
http://cvs.pld-linux.org/packages/dokuwiki/install.patch