Extract animal validation into its own function

Require FQDN as subdomain

This addresses issue #11

Add more phpDoc

Make ajax requests to test the server setup

Known issues: The request after the first-time-setup causes the user to be
logged out of the master wiki. The ajax request after creating the animals
do n

Make ajax requests to test the server setup

Known issues: The request after the first-time-setup causes the user to be
logged out of the master wiki. The ajax request after creating the animals
do not have this issue.

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Use this plugins version of farm.php

There has been a minor change to the original farm.php in lines 52 and
onwards to the end of the block. The idea is that an request to a
non-existing animal is s

Use this plugins version of farm.php

There has been a minor change to the original farm.php in lines 52 and
onwards to the end of the block. The idea is that an request to a
non-existing animal is served by the farmer wiki instead of dying with
an error message. This is done in order to be consistent with the
behaviour of a farm implemented with virtual hosts/subdomains.

Known issues: When trying to access a non-existing animal, one is logged
out of the master wiki. This happens because in inc/auth.php auth_logoff
the login-cookie is overwritten.

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Use proper Dokuwiki libraries where available

Improve the handling of the preload form

Improve button spacing / margins

Show prose on the create Animal page

Nicer plugin-edit form

see issue #5

Check for necessary farm constants instead of preload.php

This commit closes #7

Set the basedir conf for animals in an htaccess setup

see https://www.dokuwiki.org/farms#add_an_animal

Require the future basedir from the user and create a .htaccess

Return false if a operation fails

Add conf option for plugins disabled by default

Use dokuwiki libs for accessing variables

see issue #8

Move servertype setup to one-time setup

Farmdir must not be in dokuwiki and be saved as an absolute path

closes #2, closes #4

Add more prose to create preload.php dialog

fixes #1

Add more error conditions and lang strings

Move hard-coded texts to lang.php

Report errors for create preloadPHP

Move FormErrorfunction to helper function

Move reloading a adminpage to its own function

Move printed strings to lang files